solve by substitution

Question

7x-2y=35
x-4y=5

2x+y=9
8x+4y=36

Answer 1

for the first question:

x=4y+5

7(4y=5)-2y=35
28y+35-2y=35
26y=35-35
y=0

for x:
x-4y=5 (substitute)
x-o=5
x=5

(5,0)
if you want to check your answer just substitue it to any of the given linear equations. Goodluck!