Question

Given that
4
x
−
5
y
=
21

Find
x
when
y
=
−
4

Give your answer as a fraction in its simplest form.

Answer 1

Step-by-step explanation:

4x-5y=21

4x- 5×(-4)=21

4x+ 20 = 21

4x = 21-20

x = 1/4

I hope it helps you...

Answer 2

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• Given : y = -1

Given Equation : 4x - 5y = 21

Substituting the value of y in the given equation, we get :

4x - 5(-4) = 21

4x + 20 = 21

4x = 20 - 21

4x = 1

$x = \frac{1}{4}$

So the value of x is $\frac{1}{4}$ and the value of y = -4

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