Find the value of x in the system, using substitution

y=2x; 4x-y=-4

Question

Mathematics

Rohan Davies

10 September, 11:26

Find the value of x in the system, using substitution

y=2x; 4x-y=-4

+1

Answers (1)

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Ian Bautista · Answer 1

x=-2

y=-4

Step-by-step explanation:

y=2x;

4x-y=-4

Substitute y = 2x into the second equation

4x - (2x) = - 4

4x - 2x = - 4

Combine like terms

2x = - 4

Divide by 2

2x/2 = - 4/2

x=-2

Now we need to find y

y = 2x

y = 2 (-2)

y=-4

Find the value of x in the system, using substitutiony=2x; 4x-y=-4

Find the value of x in the system, using substitution

y=2x; 4x-y=-4