3 years ago

Solve each system of equations by substitution: X + Y = 75 10x + Y = 48

Mathematics

1 answer:

Nimfa-mama [501]3 years ago

6 0

Answer:

X= -3;

Y=78

Step-by-step explanation:

A: X+Y=75

B: 10X+Y=48

B-A: (10X+Y)-(X+Y)=48-75

10X+Y-X-Y= - 27

9X=-27

X= -3;

Now

A is : -3+Y=75

Y=75+3=78

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