30 points! monica paid sales tax of $1.50 when she bought a new bike helmet. if the sales tax rate was 5%, how much did the stores charge for the helmet before tax?

Use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2 + 9 = −26 −3 − 7 = 13