you need 2 equations to solve for 2 variables
x+y = 10 and y = x+8 x+x+8 = 10 x+x = 10-8 2x = 2 x = 1 Substitute the value of x into the original equations to find the value of y: So: x = 1 and y = 9
-4 plus 10 equals 6.
x=10
12 + 10 + 11 equals 33
There are 2 unknowns
you need 2 equations to solve for 2 variables
x+y = 10 and y = x+8 x+x+8 = 10 x+x = 10-8 2x = 2 x = 1 Substitute the value of x into the original equations to find the value of y: So: x = 1 and y = 9
-4 plus 10 equals 6.
If x equals 10 and y equals 10, then 9x plus 8y equals 170.
x=10
12 + 10 + 11 equals 33
-10 plus 10 equals 0.
61
10 plus 10 equals 20 20 divide by 10 equals 2 2 plus 10 equals 12
10 + 10 + 10
Solving the simultaneous equations works out as x = -2 and y = -2 So the lines intersect at: (-2, -2)