-3(-7)+1y=10

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Solution for -3(-7)+1y=10 equation: 


Simplifying
-3(-7) + 1y = 10

Multiply -3 * -7
21 + 1y = 10

Solving
21 + 1y = 10

Solving for variable 'y'.

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

Add '-21' to each side of the equation.
21 + -21 + 1y = 10 + -21

Combine like terms: 21 + -21 = 0
0 + 1y = 10 + -21
1y = 10 + -21

Combine like terms: 10 + -21 = -11
1y = -11

Divide each side by '1'.
y = -11

Simplifying
y = -11

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