3=-4(7)+b

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Solution for 3=-4(7)+b equation:


Simplifying
3 = -4(7) + b

Multiply -4 * 7
3 = -28 + b

Solving
3 = -28 + 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.
3 + -1b = -28 + b + -1b

Combine like terms: b + -1b = 0
3 + -1b = -28 + 0
3 + -1b = -28

Add '-3' to each side of the equation.
3 + -3 + -1b = -28 + -3

Combine like terms: 3 + -3 = 0
0 + -1b = -28 + -3
-1b = -28 + -3

Combine like terms: -28 + -3 = -31
-1b = -31

Divide each side by '-1'.
b = 31

Simplifying
b = 31

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