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5x+y=27 y=4x using substitution method
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2 votes
5x+y=27 y=4x using substitution method

User GauravSingh
by
8.9k points

2 Answers

3 votes
Substitute 4x for y, and solve for x;
5x + (4x) = 27
9x = 27
x = 3
Substitute 3 in for x in the first equation and solve for y;
5(3) + y = 27
15 + y = 27
y = 12
User Sam Scholefield
by
8.0k points
5 votes
5x + y = 27
substitute: 5x + 4x = 27
combine: 9x = 27
divide (by 9): x = 3
User Allison Lock
by
8.5k points
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