How Do I Solve The System Of Equations Using Substitutionx+4Y=13 5X-7Y=-16 Put In Ordered Pair I NEED HELP IMMEDIATLY?
I’m not sure what you mean by “using substitution,” but solving the system of equations is easy. It’s simply a matter of eliminating one of the variables so that you can find the value for the other. Then, once you find that value, you substitute it for the variable in one of the original equations to find the value for the other. x+4y = 13 & 5x-7y = -16 Easiest thing to do is multiply the first equation by 5 so that you can subtract one equation from the other, eliminating the x’s. 5(x+4y) = 5(13) 5x+20y = 65 Now, subtract the second equation from this one: (5x+20y)-(5x-7y) = 65-(-16) 27y = 81 y = 3 Substitute 3 for y in one of the original equations: x+4y = 13 x+12 = 13 x = 1 x = 1 & y = 3. An ordered pair is the values for x and y written in parentheses, like this: (1,3).
