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2x = 52 - 10y
x = (52 - 10y)/2
2.- [x + (y/2) = 8]2
2x + y = 16
2x = 16 - y
x= (16-y)/2
3.- (52-10y)/2 = (16-y)/2
52 - 10y = 16 - y
9y = 36
y = 36/9
y = 4
4.- 2x + 10y = 52
2x + 10(4) = 52
2x + 40 = 52
2x = 52 - 40
2x = 12
x = 12/2
x = 6