When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
Solve -c + 8c = 6c + 4z - 9 for c in terms of z.
| -z + \(\frac{5}{9}\) | |
| z + 4 | |
| \(\frac{4}{7}\)z + 1\(\frac{2}{7}\) | |
| -\(\frac{1}{15}\)z + \(\frac{7}{15}\) |