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 7a - 4a = 5a + 5z + 7 for a in terms of z.
| -z - \(\frac{7}{10}\) | |
| -\(\frac{3}{7}\)z - \(\frac{2}{7}\) | |
| -\(\frac{5}{6}\)z - \(\frac{5}{6}\) | |
| 4\(\frac{1}{2}\)z + 3\(\frac{1}{2}\) |