9x+3y=-27
-6x+y=45

Question

9x+3y=-27
-6x+y=45

anonymous · Answer

-18x+3y=135
9x+3y=-27
-27x=162
x=-6

y=45+6x=45-36=9

solution is
x=-6
y=9

jhonyy9 · Answer

multiplie second equation with 3 and subtract 9x+3y=-27
                                                                -18x+3y=135
                                                               --------------
                                                                   27x  0 =-162
                                                                       27x=-162
                                                                           x=-162/27 =-6
- so than x=-6 --- 9(-6)+3y=-27 ---- -54+3y=-27 ---- 3y=27 --- y=27/3 =9

x=-6
y=9