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Solve by substitution method 5x+y=18 and y=4x

Solve by substitution method 5x+y=18 and y=4x
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4 votes
Solve by substitution method 5x+y=18 and y=4x

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User Alyssa
by
7.5k points

1 Answer

6 votes
5x + y = 18

Given y = 4x; substituting y into the first equation:
5x + (4x) = 18

Combine x terms:
9x = 18

Divide by 9 on both sides:
x = 2 .
answered
User Bhoj
by
8.7k points
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