with the method of method substitution find X and Y question is 3 x minus 4 Y is equal to 15 and 2x + 7 Y is equal to 9
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Answer:
x=19 y=3
Step-by-step explanation:
3x-4y=15 (1)
2x+7y=9 (2)
3x=15+4y
x=19/3y (3)
2(19/3y)+7y=9
38/3y+7y=9
38-21/3y=9
9/3y=9
y=9*3/9
y=3
x=19/3(3)
x=19
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