2007-12-10 04:35:15 · 4 answers · asked by baloo 2 in Science & Mathematics ➔ Mathematics
2x + 3 = 4
2x = 1
x = 1/2
2007-12-10 06:47:44 · answer #1 · answered by Como 7 · 4⤊ 0⤋
7(2x+3) = 28
2x+3 = 28/7
2x+3 = 4
2x = 4 - 3
2x = 1
x= 1/2
2007-12-10 04:39:05 · answer #2 · answered by Gilead 2 · 0⤊ 0⤋
Simplifying
7(2x + 3) = 28
Reorder the terms:
7(3 + 2x) = 28
(3 * 7 + 2x * 7) = 28
(21 + 14x) = 28
Solving
21 + 14x = 28
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-21' to each side of the equation.
21 + -21 + 14x = 28 + -21
Combine like terms: 21 + -21 = 0
0 + 14x = 28 + -21
14x = 28 + -21
Combine like terms: 28 + -21 = 7
14x = 7
Divide each side by '14'.
x = 0.5
Simplifying
x = 0.5
2007-12-10 04:42:39 · answer #3 · answered by Anonymous · 0⤊ 2⤋
distrubate the 7 first
7*2x 7*3 =28
14x+21=28
take away 21 on both sides
14x=7
divide both sides by 14
14x/14 = 7/14
x =7/14 pr 1/2
2007-12-10 05:32:00 · answer #4 · answered by booster11373 2 · 0⤊ 0⤋