can anyone show all the steps to work out what x is equal to??
3( x/2 + 7 ) = ( x/5 + 2 )
2007-11-14 10:15:52 · 11 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
3x/2 + 21 = x/5 + 2
Multiply the whole thing by 10 to get rid of the fraction
15x + 210 = 2x + 2
Subtract 2x from both sides and subtract 210 from both sides
13x = - 208
Divide by 13 to get x alone
x = -16
y do u use other's brains
2007-11-14 12:42:27 · answer #1 · answered by Nida 2 · 0⤊ 0⤋
3( x/2 + 7 ) = ( x/5 + 2 )
3x/2 + 21 = x/5 =2
1 3x/10 = -19
x = -190/13
2007-11-15 06:51:12 · answer #2 · answered by m!l@ 2 · 0⤊ 0⤋
3( x/2 + 7 ) = ( x/5 + 2 )
3x/2 + 21= (x/5 + 2) -Multiply by common factor -10
15x +210 = 2x + 20 -Subtract
13x = -190 - divide
x= -14.6153846 or x = -190/13
2007-11-14 18:25:12 · answer #3 · answered by sooowhere 1 · 1⤊ 0⤋
Multiply out the brackets on the LHS to get:
3x/2 + 21 = x/5 + 2
Multiply both sides by 10 to get:
15x + 210 = 2x + 20
Subtract 2x from both sides to get:
13x + 210 = 20
Subtract 210 from both sides to get:
13x = 20 - 210
13x = -190
Divide both sides by 13 to get:
x = -190/13 or x = -14 8/13
2007-11-15 04:32:18 · answer #4 · answered by RATTY 7 · 0⤊ 0⤋
first answer is best but slightly wrong(ms exxclusive)
3x/2 + 21 = x/5 + 2
Multiply the whole thing by 10 to get rid of the fraction
15x + 210 = 2x + 20
Subtract 2x from both sides and subtract 210 from both sides
13x = - 190
Divide by 13 to get x alone
x = -14.165
2007-11-14 19:47:07 · answer #5 · answered by Anonymous · 0⤊ 0⤋
3x/2 + 21 = x/5 + 2
Multiply the whole thing by 10 to get rid of the fraction
15x + 210 = 2x + 2
Subtract 2x from both sides and subtract 210 from both sides
13x = - 208
Divide by 13 to get x alone
x = -16
2007-11-14 18:20:54 · answer #6 · answered by Ms. Exxclusive 5 · 0⤊ 1⤋
3( x/2 + 7 ) = ( x/5 + 2 )
Remove brackets by multiplying:
3x/2+21=x/5+2
Collect like terms on opposite sides:
3x/2-x/5=2-21
x(3/2-1/5)=-19
x((15-2)/10)=-19
19x= -13/10
x= -13/190
2007-11-14 18:24:05 · answer #7 · answered by Robert S 7 · 0⤊ 1⤋
distribute the 3 first
3x/2+21=x/5+2
subtract 2 fromboth sides
3x/2+19=x/5
multiply both sides by 5 and distribute
5(3x/2+19)=x ---> 15x/2+95=x
subtract 15x/2 from both sides
95=x-15x/2
combine x
95=-6.5x
divide -6.5 from both sides
x=-14.615
2007-11-14 18:26:04 · answer #8 · answered by LAG 2 · 0⤊ 0⤋
Ms Exxclusive gave what should have been the best answer except for error in second line of working :-
It should have been 15x +210 = 2x + 20
2007-11-14 18:55:01 · answer #9 · answered by Anonymous · 0⤊ 0⤋
(3/2)x + 21 = x/5 + 2
x(3/2 - (1/5)) = 2 -21
x= -19/(10/13)= -24.7
2007-11-14 18:22:23 · answer #10 · answered by tinhnghichtlmt 3 · 0⤊ 0⤋