-3y-7=-10y+21

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Solution for -3y-7=-10y+21 equation:


Simplifying
-3y + -7 = -10y + 21

Reorder the terms:
-7 + -3y = -10y + 21

Reorder the terms:
-7 + -3y = 21 + -10y

Solving
-7 + -3y = 21 + -10y

Solving for variable 'y'.

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

Add '10y' to each side of the equation.
-7 + -3y + 10y = 21 + -10y + 10y

Combine like terms: -3y + 10y = 7y
-7 + 7y = 21 + -10y + 10y

Combine like terms: -10y + 10y = 0
-7 + 7y = 21 + 0
-7 + 7y = 21

Add '7' to each side of the equation.
-7 + 7 + 7y = 21 + 7

Combine like terms: -7 + 7 = 0
0 + 7y = 21 + 7
7y = 21 + 7

Combine like terms: 21 + 7 = 28
7y = 28

Divide each side by '7'.
y = 4

Simplifying
y = 4

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