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