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 -4a + 7a = 9a + 7z - 5 for a in terms of z.
| 1\(\frac{3}{5}\)z + 1\(\frac{4}{5}\) | |
| 1\(\frac{1}{13}\)z + \(\frac{7}{13}\) | |
| z + \(\frac{5}{13}\) | |
| -\(\frac{2}{13}\)z - \(\frac{1}{13}\) |