-7x - 2y = 19
4x + y = -12
Set y equal to each other (opposite signs are fine and you could also set x equal instead of y)
-7x - 2y = 19
8x + 2y = -76
Add equations together
x = -52
Plug x value into an equation
4(-52) + y = -12
Solve for y
-208 + y = -12
y = 196
Hope this helps! ;)
102/87 = 3*34/(3*29) = 34/29
5
To find the ratio you simply divide the value by the previous value
7.56/1.512 = 5
37.8/7.56 = 5
