Question 402547
Solve:
1) {{{y = 8-x}}} Substitute this for y in equation 2).
2) {{{7 = 2-y}}}
2a) {{{7 = 2-(8-x)}}}
2b) {{{7 = 2-8+x}}} Notice the change of sign on x.
2c) {{{7 = -6+x}}}
2d) {{{13 = x}}} or {{{x = 13}}} Notice that x is positive! Now substitute this value of x into either one of the two given equations and solve for y. Let's use equation 1).
1) {{{y = 8-x}}} Substitute x = 13.
1a) {{{y = 8-13}}} so {{{y = -5}}}
The solution is: (13,-5)