Solve the solving system by substitution Y=x+9 3x+8y=-5 Question Solve the solving system by substitution Y=x+9 3x+8y=-5 in progress 0 Math Ruby 2 weeks 2021-11-23T23:51:01+00:00 2021-11-23T23:51:01+00:00 2 Answers 0 views 0

## Answers ( )

Answer:## x= -7 and y= 2

Step-by-step explanation:Given that y= x+9 …………(i)

3x+8y= -5 ………(ii)

required: the value of x and y

now take equation (i) above substitute into equation (ii), we get

3x+8(x+9)= -511x+72= -5

11x= -77 divide by 11, we get

x= -7

now from

y= x+9, but x= -7

y= -7+9= 2

y=2

therefore the value of x= -7 and y= 2

The solution of the two equations isandExplanation:The two

equationsare andLet us determine the solution of the equation using substitution method.

Thus, substituting in the equation , we get,

Multiplying the terms within the bracket, we have,

Subtracting both sides of the equation by -72, we get,

Dividing both sides of the equation by 11, we have,

Now, substitutingin the equation , we get,

Thus, the

solution of the two equations isand