4+3=7y-21

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Solution for 4+3=7y-21 equation:


Simplifying
4 + 3 = 7y + -21

Combine like terms: 4 + 3 = 7
7 = 7y + -21

Reorder the terms:
7 = -21 + 7y

Solving
7 = -21 + 7y

Solving for variable 'y'.

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

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

Combine like terms: 7y + -7y = 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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