7=4-a

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Solution for 7=4-a equation:


Simplifying
7 = 4 + -1a

Solving
7 = 4 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
7 + a = 4 + -1a + a

Combine like terms: -1a + a = 0
7 + a = 4 + 0
7 + a = 4

Add '-7' to each side of the equation.
7 + -7 + a = 4 + -7

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

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

Simplifying
a = -3

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