Answer:
x=3
Step-by-step explanation:
5(7x-4y=18)
4x+20y=27
35x-20y=90
4x+20y=27 just eliminate the -20 and +20 then get
39x=117
39x=117
then divide on both sides
Answer:
x=2.14,y=0.75
Step-by-step explanation:
7x-4y=18..(1)
4x+20y=27...(2)
Multiply (1) by 4
28x-16y=72...(3)
Multiply (2) by 7
28x+140y=189..(4)
Substrate (3) from (4)
156y=117
Divide both sides by 156
y=117/156
y=0.75
Substitute the value of y in (3)
28x-16(0.75)=72
28x-12=72
Add 12 to both sides
28x=60
Divide both sides by 28
x=2.14
Therefore x=2.14,y=0.75
