Question

x +2y=140,3x +4y=360 solve by substitution method.​

Answer 1

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Answer 2

Answer:

x+2y=140

Step-by-step explanation:

x=140-2y_____1

3x+4y=360_____2

put 1 in 2

3(140-2y)+4y=360

420-6y+4y=360

-2y=360-420

-y=-30

y=30_____3

put this in 1

x+60=140

x=80