4x+3y=13 solve by using substitution method. y=-x/4

Question

Mathematics

Danny Adams

13 December, 08:40

4x+3y=13 solve by using substitution method. y=-x/4

+4

Answers (1)

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Jacqueline Mcguire · Answer 1

Subsitute - x/4 for y

4x+3y=13

4x+3 (-x/4) = 13

4x-3x/4=13

times both sides by 4 because we hate fractions

16x-3x=52

13x=52

divide both sides by 13

x=4

sub back

y=-x/4

y=-4/4

y=-1

(x, y)

(4,-1)

the solution is (4,-1)