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Question: Math

Solve for both systems: 5x+7y=124 and 4x + 3y = 55

In Math | Asked by AnneS2
Answers

5x+7y=124

5x+7y-7y=124-7y

5x=124-7y

5x/5=124-7y/5

x=24.8-1.4y

4x + 3y = 55

4(24.8-1.4y) + 3y = 55

4(24.8)   (4)(-1.4y) + 3y = 55

99.2 -5.6y + 3y = 55

99.2 -2.6y= 55

99.2 -2.6y-99.2= 55-99.2

-2.6y=-44.2

-2.6y/-2.6=-44.2/-2.6

y=17

x=24.8-1.4y

x=24.8-1.4(17)

x=24.8-23.8=1

CherieS | 190 days ago