You move everything else to the other side of the equality sign.
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Divide both sides of the equation by 15
280
The value of 'c' that makes the equation a true statement is the answer.Here's how to find it:Write the equation:3c - 15 = 17 - cAdd 'c' to each side:4c - 15 = 17Add 15 to each side:4c = 32Divide each side by 4:c = 8
The goal is to make the equation equal X.45=-15-5x
13x = 15 - 2 x Solve for x 1. Get the x's on one side. Add 2x to each side. 13x + 2x = 15 - 2x + 2x This is the same as 15x = 15 2. Get x by itself. Divide each side by 15. 15x/15 = 15/15 x = 1