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y = 4x - 8

y = 2x + 10

The substitution means to:

Find the intersection point of their graphs, which is the common solution of this linear system of equations:

4x - 8 = 2x + 10

2x = 18

x = 9

y = 4(9) - 8 = 36 - 8 = 28 or

y = 2(9) + 10 = 28

Thus the solution is (9, 28)

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Q: What y 4x - 8 and y 2x 10 solve using substitution?
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