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bogdanovich [222]
3 years ago
13

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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