Answer:
x = 2.5
y = 5
Step-by-step explanation:
2x + 3y = 20
2x + y = 10 then y = 10 - 2x
substitute for y:
2x + 3(10 - 2x) = 20
2x + 30 - 6x = 20
reduce:
-4x = -10
divide both sides by -4:
x = 2.5
y = 10 - 2(2.5) = 5
check:
2(2.5) + 3(5) = 20
20 = 20
and
2(2.5) + 5 = 10
10 = 10
