#6. (4x-2)/5=10
x5 x5(multiplication property)
4x-2=50
+2 +2( reflexive property of equality)
4x=52
1/4(4x)=1/4(51)multiplication property)
x=13 (multiplicative inverse)
#7.
-x/3 -5=2x
3(-x/3) -5=3(2x) (multiplication property)
-x-5=6x
+x +x (reflexive property of equality)
-5=7x
1/7(-5)= 1/7(7x)(multiplication property)
-.7=x (multiplicative inverse)
2007-08-01 06:49:38 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
#6 is right.
#7 when you multiply by 3, you have to multiply all of the numbers by 3, including the -5.
-x/3 -5 = 2x
-x -15 = 6x
-15 = 7x
-15/7 = x
2007-08-01 06:55:56 · answer #1 · answered by T 5 · 0⤊ 0⤋
4x-2=5*10 so 4x= 52 x= 52/4 =13
-x-15=6x 7x=-15 and and x= -15/7
you have to multiply (-5) by 3
2007-08-01 06:57:44 · answer #2 · answered by santmann2002 7 · 0⤊ 0⤋
#6. (4x - 2) / 5 = 10
4x - 2 = 50
4x = 52
x = 13
#7. - x/3 - 5 = 2x
- x/3 = 2x + 5
- x = 6x + 15
- 7x = 15
x = - 2 1/7
Answer: For me instead of - .7 x should be - 2 1/7 in #7.
2007-08-05 00:45:11 · answer #3 · answered by Jun Agruda 7 · 2⤊ 0⤋