If we are not given the exact relationship between two variables, it is not possible to find the value of one variable corresponding to the value of the other variable. Let us solve it by the two following methods and see the difference.
Method 1
When x=3 then y=12
i.e., y/x=12/3=4
i.e., y=4x
When x=7, then y=4*7=28
Method 2
When x=3 then y=12
i.e., x+y=3+12=15
i.e., y=15-x
When x=7, y=15-7=8
x=(-9/7) 7x+12=3 7x=(-9) x=(-9/7)
-3 and 2/7
7/3
12 - 7 = 5 5 + (-3) = 2
2n plus 7 equals 19 2n equals 12 n equals 6
3
3 - 8 + 12 = x -5 + 12 = x 7 = x Answer : 7
If: 7+3m = -29 then the value of m is -12
4/7
The value of n is 3, by the commutative property.
12 + 7 = 4x - 312 + 7 + 3 = 4x22 = 4x22/4 = xx = 5.5
7