On the left side of the equal sign, multiply everything in the parenthesis by 8. On the right side of the equal sign, multiply everything in the parenthesis by 6.
8c - 72 = 12c - 72 - 4c
Combine like terms.
8c - 72 = 8c - 72
Add 72 to both sides.
8c = 8c
Subtract 8c from both sides.
0 = 0
This means that there is an infinite amount of solutions.
Since <span>cc</span> is on the right side of the equation, switch the sides so it is on the left side of the equation.<span><span>6<span>(2c−12)</span>−4c=8<span>(c−9)</span></span><span>6<span>(2c-12)</span>-4c=8<span>(c-9)</span></span></span>Simplify the left side.<span><span>8c−72=8<span>(c−9)</span></span><span>8c-72=8<span>(c-9)</span></span></span>Simplify the right side.<span><span>8c−72=8c−72</span><span>8c-72=8c-72</span></span>Move all terms containing <span>cc</span> to the left side of the equation..<span><span>−72=−72</span><span>-72=-72</span></span>Since <span><span>−72=−72</span><span>-72=-72</span></span>, the equation will always be true.Always true
