1.
two numbers differ by 3. The sum of the greater number and twice the smaller number is 15
Find the smaller number.
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Step-by-step explanation:
the two numbers are x and y
bigger no. be x and smaller no be y
from 1st condition
x-y=3......(1)
from 2nd condition
x+2y=15....(2)
multiply by 1 equation 2
2x-2y=6....(3)
add equ 2 and 3
2x-2y=6
+
x+2y=15
________
3x=21
x=7
put in 1st equation
7-y=3
-y=3-7
-y=-4
y=4
the smaller number be 4
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