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PSYCHO15rus [73]
3 years ago
7

One number is four less than a second number. Three times the first is 13 more than 4 times the

Mathematics
1 answer:
olganol [36]3 years ago
4 0
Let first number is x
second number be y

one number is four less than a second number: x=y-4


Three times the first is 6 more than 6 times the second: 3x=6y+6

substitute x=y-4 in 3x=6y+6

3x =6y+6
3(y-4)=6y+6

3y-12=6y+6

3y-6y=6+12
-3y=18
y=-6

substitute y=-6 in x=y-4

x=-6-4=-10

so first number is -10
second number is -6
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