7=a(1-2)+3

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Solution for 7=a(1-2)+3 equation:


Simplifying
7 = a(1 + -2) + 3

Combine like terms: 1 + -2 = -1
7 = a(-1) + 3

Reorder the terms for easier multiplication:
7 = -1a + 3

Reorder the terms:
7 = 3 + -1a

Solving
7 = 3 + -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 = 3 + -1a + a

Combine like terms: -1a + a = 0
7 + a = 3 + 0
7 + a = 3

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

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

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

Simplifying
a = -4

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