4(a-3)-7=6a-21

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Solution for 4(a-3)-7=6a-21 equation:


Simplifying
4(a + -3) + -7 = 6a + -21

Reorder the terms:
4(-3 + a) + -7 = 6a + -21
(-3 * 4 + a * 4) + -7 = 6a + -21
(-12 + 4a) + -7 = 6a + -21

Reorder the terms:
-12 + -7 + 4a = 6a + -21

Combine like terms: -12 + -7 = -19
-19 + 4a = 6a + -21

Reorder the terms:
-19 + 4a = -21 + 6a

Solving
-19 + 4a = -21 + 6a

Solving for variable 'a'.

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

Add '-6a' to each side of the equation.
-19 + 4a + -6a = -21 + 6a + -6a

Combine like terms: 4a + -6a = -2a
-19 + -2a = -21 + 6a + -6a

Combine like terms: 6a + -6a = 0
-19 + -2a = -21 + 0
-19 + -2a = -21

Add '19' to each side of the equation.
-19 + 19 + -2a = -21 + 19

Combine like terms: -19 + 19 = 0
0 + -2a = -21 + 19
-2a = -21 + 19

Combine like terms: -21 + 19 = -2
-2a = -2

Divide each side by '-2'.
a = 1

Simplifying
a = 1

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