Question

8x-3y=12;5x=2y+7 cross multiplication method

Answer 1

Answer:

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Step-by-step explanation:

First equation

8x=12+3y

x= (12+3y) divide by 8

Second equation

5x= 2y+7

x = (2y+7) divide by 5

Substitute x

(12+3y) divide 8 = (2y + 7)divide 5

Cross multiply

5(12+3y) = 8(2y+7)

60 +15y = 16y +56

60-56 = 16y-15y

y=4

Now use y=4 to find x using either one equation

8x =12+3y

8x = 12 + 3(4)

8x = 12 + 12

8x = 24

x = 3

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