algebra
2007-05-01 13:29:12 · 4 answers · asked by ur baby 1 in Science & Mathematics ➔ Mathematics
You don't have to write all this down when you solve equations, I just wanted to show you how to do it.
2y + 18 = 12 - 6 (y + 7)
2y+18=6(y+7)
2y+18=6y+42
2y + 18 -18 = 6y + 42 - 18
2y - 6y = 6y - 6y + 24
(-1) -4y = 24 (-1)
4y= -24
4y/4 = -24/4
y= -6
2007-05-01 13:36:56 · answer #1 · answered by Do You Feel 3 · 2⤊ 0⤋
2y+18=12-6y-42
2y+18+6y=12-6y+6y-42
8y+18=-30
8y+18-18=-30-18
8y=-48
y=-6
2007-05-01 13:37:49 · answer #2 · answered by Dave aka Spider Monkey 7 · 2⤊ 0⤋
2y+18=12-6(y+7)
2y+18=12-6y-42
2y+18=-6y-30
8y+18=-30
8y=-48
y=-6
Check:
2(-6)+18=12-6(-6+7)
-12+18=12-6(1)
-12+18=12-6
6=6
2007-05-01 13:44:24 · answer #3 · answered by Anonymous · 1⤊ 0⤋
-6, just combine like terms and isolate the y.
2007-05-01 13:35:38 · answer #4 · answered by sterces518255 3 · 1⤊ 0⤋