A) 15 B 24
C) 18
D) 22.5
x + 5y = 9 and 5x + 3y = 7 then what is the value of x + y?
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Step-by-step explanation:
x+5y=9
x=9-5y ——1
5x+3y=7 ——2
Substitute equation 1 in 2
5(9-5y)+3y=7
45-25y+3y=7
45-22y =7
-22y=7-45
-22y= -38
y=-38÷-22
=19÷11
y =1.72 ——3
substitute y in equation 1
x=9-5(1.72)
=0.4
x+y= 1.72+0.4
2.12
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