40-3a=88-7a

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Solution for 40-3a=88-7a equation:


Simplifying
40 + -3a = 88 + -7a

Solving
40 + -3a = 88 + -7a

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '7a' to each side of the equation.
40 + -3a + 7a = 88 + -7a + 7a

Combine like terms: -3a + 7a = 4a
40 + 4a = 88 + -7a + 7a

Combine like terms: -7a + 7a = 0
40 + 4a = 88 + 0
40 + 4a = 88

Add '-40' to each side of the equation.
40 + -40 + 4a = 88 + -40

Combine like terms: 40 + -40 = 0
0 + 4a = 88 + -40
4a = 88 + -40

Combine like terms: 88 + -40 = 48
4a = 48

Divide each side by '4'.
a = 12

Simplifying
a = 12

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