Question: Math

Solve for both systems: 2z+9x=67 and 3z + 5x = 58

In Math | Asked by AnneS2
Answers

2z+9x=67

2z+9x-9x=67-9x

2z=67-9x

2z/2=67-9x/2

z=33.5-4.5x

3z + 5x = 58

3(33.5-4.5x) + 5x = 58

3(33.5)   (3)(-4.5x) + 5x = 58

100.5-13.5x + 5x = 58

100.5-8.5x= 58

100.5-8.5x-100.5= 58-100.5

-8.5x=-42.5

-8.5x/-8.5=-42.5/-8.5

x=5

z=33.5-4.5x

z=33.5-4.5(5)

z=33.5-22.5=11

 

CherieS | 404 days ago