Question

Solve.2x+3y=7;x-7y=11

Answer 1

x-7y=11
x=11+7y......... (1)

2x+3y=7.
2 (11+7y)+3y=7 (Using equation (1))
22+14y+3y=7
22+17y=7
17y=7-22
17y=-15.
y=-15/17
Putting y=-15/17 In equation (1),we get:
x=82/17.
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