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Solve thee simultaneous equations 15x+45y=600 15x+15y=270 What are x and y? (Answer in decimal or whole number)
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Solve thee simultaneous equations

15x+45y=600
15x+15y=270
What are x and y? (Answer in decimal or whole number)

User Keith Johnston
by
7.3k points

1 Answer

5 votes
Answer is (7, 11) x=7, y=11

Subtraction

15x + 45y = 600
- (15x + 15y = 270)

30y = 330
Divide by 30

y = 11

Sub value of y into equation 2

15x + 15(11) = 270
15x + 165 = 270
Subtract
15x + 165 - 165 = 270 - 165

15x = 105
Divide

X = 7

X=7, y = 11
User Iwan Satria
by
7.6k points
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