Question

The expression ax + by has value 7 when x=2, y=1. When x=-1, y=1, it has value 1, find a and b

Answer 1

a×2 + b×1 =7
a×-1 + b×1 = 1

2a + b=7
-a + b = 1

subtract it
2a + b= 7
a - b =-1


3a=6
a= 2

b= 3

Answer 2

Hello dear your answer .






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