x=5y-8, 4x+3y=5
you have the vale of x. x=5y-8. so substitute that value in place of x in the second equation.
4(5y-8) + 3y = 5
20y - 32 + 3y = 5
20y + 3y= 5 +32
23y = 37
y = 37/23 = approx 1.6
place the found value of y into the first equation and solve for x
x = 5y -8
x = 5(1.6) -8
x= 8.04 - 8
x = 0.04
ck
x=5y-8, 4x+3y=5
(0.04) = 5(1.6) -8, 4(0.04) +3(1.6) =5
0.04 = 8-8, 0.16 + 4.8 = 5
0.04=0, 4.96 = 5