Answer:
x=1 and y=5
Step-by-step explanation:
simultaneous equations: substitution method
2x+4y=22----equation 1
7x+y=12---equation 2
from equation 2 make y the subject
y=12-7x----equation 3
substitute y into equation 1 to find x
2x+4(12-7x)=22
2x+48-28x=22
collect like terms
2x-28x=22-48
-26x=-26
divide by -26
-26x/-26=-26/-26
x=1
substitute x=1 into equation 3
y=12-7(1)
y=12-7
y=5
therefore, x=1 and y=5
