Solve each system of linear equations by adding or subtracting. 3x + 4y = 15 3x - y = 30 Enter the solution as an ordered pair. The solution is

( 9, − 3 )

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

x = 9  and  y = − 3

o= 4(i) +3

step-by-step explanation:

o is your output value and i is your input value. so, for example, if we stuck 7 in as our input, we would first multiply by 4 ( pemdas ), which equals 28. then we would add 3 to 28, for a total output of 31. this may not be a graph, but, it is a way to solve your formula..