Solve for a
a=-42
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\left(a-6\right)\times 7=4a\times 2
Variable a cannot be equal to any of the values 0,6 since division by zero is not defined. Multiply both sides of the equation by 4a\left(a-6\right), the least common multiple of 4a,a-6.
7a-42=4a\times 2
Use the distributive property to multiply a-6 by 7.
7a-42=8a
Multiply 4 and 2 to get 8.
7a-42-8a=0
Subtract 8a from both sides.
-a-42=0
Combine 7a and -8a to get -a.
-a=42
Add 42 to both sides. Anything plus zero gives itself.
a=-42
Multiply both sides by -1.
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