Question: Math

Solve for both systems: 4x - 3y = 47 and - 5x - 9y = 5

In Math | Asked by AnneS2
Answers

4x - 3y = 47

4x - 3y+3y = 47+3y

4x= 47+3y

4x/4= 47+3y/4

x=11.75+.75y

- 5x - 9y = 5

- 5(11.75+.75y) - 9y = 5

- 5(11.75)   (-5)(+.75y) - 9y = 5

-58.75 -3.75y - 9y = 5

-58.75 -12.75y= 5

-58.75 -12.75y+58.75= 5+58.75

-12.75y= 5+58.75

-12.75y= 63.75

-12.75y/-12.75= 63.75/-12.75

y= 63.75/-12.75

y=-5

x=11.75+.75y

x=11.75+.75(-5)

x=11.75+-3.75=8

CherieS | 289 days ago