show work
2007-04-25 10:10:00 · 17 answers · asked by Rosa S 1 in Science & Mathematics ➔ Mathematics
2x+12-3x=x+7
-x+12=x+7
-2x=-5
x=2.5
2007-04-25 10:14:03 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Solve 2x+3(4-x)=x+7 or
2x+12-3x=x+7 or -2=-5, So x=-2.5 answer
2007-04-25 17:22:20 · answer #2 · answered by Anonymous · 1⤊ 0⤋
2x + 3(4 - x) = x + 7 (original equation)
2x + 12 - 3x = x + 7 (use distributive property to get 12 - 3x)
-x + 12 = x + 7 (subtract 3x from 2x)
-x - x = 7 - 12 (get x on one side and whole numbers on other)
-2x = -5 (subtract x from -x and subtract 12 from 7 to get this)
-2x / -2 = -5 / -2 (divide each side by -2)
x = 5 / 2 or 2.50 (answer)
NOTE: Getting the answer from this site is one thing, but knowing how to solve the equation on a test is another. Be sure to know how to solve similar equations for any quizzes or tests you may be required to take.
2007-04-25 17:28:13 · answer #3 · answered by paypalcurious 2 · 1⤊ 0⤋
Perform the multiplication:
2x + 12 - 3x = x + 7
Add x to both sides of the equation:
12 = 2x + 7
Subtract 7 from both sides of the equation:
5 = 2x
Divide each side of the equation by 2:
2.5 = x
Check your work by substituting 2.5 for x in the original equation:
2(2.5) + 3(4 - 2.5) = 2.5 + 7
5 + 3(1.5) = 9.5
5 + 4.5 = 9.5
9.5 = 9.5
x is 2.5!
2007-04-25 17:20:31 · answer #4 · answered by Jeff 2 · 1⤊ 0⤋
2x + 12 - 3x = x + 7
-x + 12 = x + 7
-2x = -5
x = 5/2
2007-04-25 17:15:08 · answer #5 · answered by whatcanmaxdo4u?everythingupscant 3 · 1⤊ 1⤋
2x +12-3x = x+7
-x + 12 = x + 7
-2x = -5
x = 5/2
2007-04-25 17:13:05 · answer #6 · answered by z 2 · 1⤊ 1⤋
2x+3(4-x)=x+7
2x+12-3x=x+7
-x+12=x+7
-x -x
-2x+12=7
-12 -12
-2x/-2=-5/-2
x=2.5
2007-04-25 17:26:29 · answer #7 · answered by bebopbabe 2 · 1⤊ 0⤋
2x + 12 - 3x = x + 7
12 - x = x + 7
2x = 5
x = 5 / 2
2007-04-25 17:40:01 · answer #8 · answered by Como 7 · 0⤊ 0⤋
2x+3(4-x)=x+7
12-3x = -x+7
-3x = -x - 5
-2x = -5
-x = -2.5
x= 2.5
2007-04-25 17:20:15 · answer #9 · answered by Anonymous · 1⤊ 0⤋
2x+3(4-x)=X+7
2x+12-3X=x+7--distributive property--
-1x+12=x+7--combining like terms--
-x -x
-2x+12=7
-12 -12
-2x=-5
/-2 /-2
x=0.4
2007-04-25 17:23:35 · answer #10 · answered by Anonymous · 0⤊ 1⤋