5x_4y=18,10x_10y=20 by elimination method
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Answer:
x=10 ; y=8
Step-by-step explanation:
Given:
5x-4y=18__(1)
10x-10y=20__(2)
eliminating x
(1)×10= 50x-40y=180
(2)×5= 50x-50y=100 (-)
= 10y=80
y=80/10
then y=8
substituting y=8 in 1 equation
5x-4y=18__(1)
5x-4(8)=18
5x-32=18
5x=18+32
x=50/5
x=10
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Elimination method is a way of solving equations in two variables by completely eliminating one variable keeping the other.
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