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 -9a + 4a = a - 6z - 7 for a in terms of z.
| \(\frac{1}{5}\)z - 1\(\frac{2}{5}\) | |
| -1\(\frac{1}{2}\)z - 1\(\frac{1}{4}\) | |
| z + \(\frac{7}{10}\) | |
| -2z - 3 |