Question

Jenny wants to save $900 to go on a trip with her friends. She saves $45 each week. Her brother gives her $180. Write an equation to find out how many weeks she must save for her trip (1) 45x = 900 (2) 180 + 900 = 45x (3) 45x - 180 = 900 (4) 45x + 180 = 900

Answer 1

Let x represent the number of weeks

Given that she wants to save $900.

She saves $45 each week and her brother gives her $180.

The equation to represent this is:

45x + 180 = 900

To find the number of weeks, let's solve for x:

Subtract 180 from both sides

45x + 180 - 180 = 900 - 180

45x = 720

Divide both sides by 45;

`\begin{gathered} (45x)/(45)=(720)/(45) \\ \\ x\text{ = }16 \end{gathered}`

Therefore, the number of weeks she must save for her trip is 16 weeks

ANSWER:

45x + 180 = 900