Posted by Sam on .
I cannot solve these last three systems. Could you show me the work for them so i understand how to do them.
Math Systems -
in the equation x - y = 1, solve for x in terms of y.
replace x in either of the other two equations and you will be able to solve for x. Now, you can go back to any of the three equations and replace x with the value you found and solve for y.
Check that your solution for x and y satisfy all three equations.
Math Systems - Partial answer -
x = 1 + y
2(1 + y) + y = 5
2 + 2y + y = 5
3y = 3
y = 1
3x - 4 = 2
3x = 6
x = 2