SOLUTION: two times a number plus three times another number equals 4.three times the first number plus four times the other number is 7.find the numbers.

SOLUTION: two times a number plus three times another number equals 4.three times the first number plus four times the other number is 7.find the numbers.

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Question 257035: two times a number plus three times another number equals 4.three times the first number plus four times the other number is 7.find the numbers.
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
2a+3b=4
3a+4b=7
subtract first from second
a+b=3
a=3-b
substitute in either
2(3-b)+3b=4
6-2b+3b=4
2+b=0
b=-2
a=3-(-2)=5
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