Question

2x+8y=24 and x-7y=-21 solution

Answer 1

x = 0 and y = -3 or (0,-3)

Explanation:

x = 7y - 21

2(7y - 21) +8y = 24

14y - 42 + 8y = 24

22y = 66

y = 3

solve for x,

2x + 8(3) = 24

2x +24 = 24

x = 0

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Answer 2

x=0, y=3

Explanation:

You can solve this by substitution and eliminaton.

First, for substitution, we should solve for x through one of the problems.

x-7y=-21

+7y

x=-21+7y

x=7y-21

Now we substitute for x!

2x+8y=24

2(7y-21)+8y=24

22y−42=24

+42 +42

22y=66

/22 /22

y=3

Now that we have y, we can plug in the same value for x, too.

x-7y=-21

x-7(3)=-21

x-21=-21

x=0