12=-0.2(7)+b

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Solution for 12=-0.2(7)+b equation:


Simplifying
12 = -0.2(7) + b

Multiply -0.2 * 7
12 = -1.4 + b

Solving
12 = -1.4 + b

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
12 + -1b = -1.4 + b + -1b

Combine like terms: b + -1b = 0
12 + -1b = -1.4 + 0
12 + -1b = -1.4

Add '-12' to each side of the equation.
12 + -12 + -1b = -1.4 + -12

Combine like terms: 12 + -12 = 0
0 + -1b = -1.4 + -12
-1b = -1.4 + -12

Combine like terms: -1.4 + -12 = -13.4
-1b = -13.4

Divide each side by '-1'.
b = 13.4

Simplifying
b = 13.4

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