2=3(-7)+b

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


Simplifying
2 = 3(-7) + b

Multiply 3 * -7
2 = -21 + b

Solving
2 = -21 + 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.
2 + -1b = -21 + b + -1b

Combine like terms: b + -1b = 0
2 + -1b = -21 + 0
2 + -1b = -21

Add '-2' to each side of the equation.
2 + -2 + -1b = -21 + -2

Combine like terms: 2 + -2 = 0
0 + -1b = -21 + -2
-1b = -21 + -2

Combine like terms: -21 + -2 = -23
-1b = -23

Divide each side by '-1'.
b = 23

Simplifying
b = 23

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