
4x  10y = 32 4x  10y = 32
x + 3y = 9 > 4x + 12y = 36 ← multiplied bottom equation by 4

2y = 68 ← added the two equations
y = 34 ← divided by 2
x + 3y = 9 ← bottom equation
x + 3(34) = 9 ← substituted 34, in for y, into bottom equation
x + 102 = 9 ← multiplied
x = 93 ← subtracted 102 from each side
x = 93 ← divided each side by 1
x = 93 and y = 34
 Proof
