Question

Verify whether (-2,5) is the solution of the equation 15 + 4x = 15.
Step by step Explaination needed...​

Answer 1

Answer:

Two solutions are (5,1) , (10,5)

and (2,-2) is not a solution of the given equation.

Step-by-step explanation:

Given 4x-5y=15

so 4x=15+5y

hence x=(5y+15)/4

for y=1

x=(5+15)/4=20/4=5

and for y=5

x=(25+15)/4=40/4=10

hence two solutions are (5,1) and (10,5)

lets substitute

y= -2

x=(-10+15)/4=5/4 which is not equal to 2

Hence (2,-2) is not a solution of the given equation.

proved

Step-by-step explanation:

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