3=-2a+7

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Solution for 3=-2a+7 equation:


Simplifying
3 = -2a + 7

Reorder the terms:
3 = 7 + -2a

Solving
3 = 7 + -2a

Solving for variable 'a'.

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

Add '2a' to each side of the equation.
3 + 2a = 7 + -2a + 2a

Combine like terms: -2a + 2a = 0
3 + 2a = 7 + 0
3 + 2a = 7

Add '-3' to each side of the equation.
3 + -3 + 2a = 7 + -3

Combine like terms: 3 + -3 = 0
0 + 2a = 7 + -3
2a = 7 + -3

Combine like terms: 7 + -3 = 4
2a = 4

Divide each side by '2'.
a = 2

Simplifying
a = 2

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