Question

solve the following pair of equation by substitution methods 3x+y =4 2(y-5)=-5x
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Answer 1

Answer:

Step by step

= (3+4×2-5-5) (x+x) (y-y)

= (3+8-5-5) (x2) (y2)

= (11-5-5)

= 21×2y^