Question

Please help me on these questions, when/if u answer do the answer like this please "1. x=5" or what ever just so i know which one.
1.Solve for the variable: 2x - 28 = 16 Options: 17 -6 11.5 22
2.Solve for the variable 12=5x+7 options: 1 -5 -1 25
3.Solve for x: 140=10x+4x Options: 10 3.5 13.6 136

Answer 1

1. x = 22, 2. x = 1, 3. x = 10

1.

2x - 28 = 16 ( add 28 to both sides )

2x = 44 ( divide both sides by 2 )

x = 22 ← solution

2.

12 = 5x + 7 ( subtract 7 from both sides )

5 = 5x ( divide both sides by 5 )

1 = x ⇒ x = 1 ← solution

3.

140 = 10x + 4x ( collect like terms on right side )

140 = 14x ( divide both sides by 14 )

10 = x ⇒ x = 10 ← solution