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(iv) 2x + 2y = 50,
x-y = 1.
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Answer:
x-y=1
x=1+y
2(1+y)+2y=50
2+2y+2y =50
4y =50-2
4y=48
y =48/4
x/1 - 48/4 =1
4x - 48 / 4 =1
4x - 48 / 4 -1
4x - 48 = 4
4x = 48 + 4
4x = 52
X = 53 / 4 .
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