( (45) (9x) )
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9x = 4x + 45 5x = 45x = 9
9x-3y=63 7x-3y=45 -3y=63-9x -y=21-3x y=-21+3x 7x-3(-21+3x)=45 7x+63+9x=45 7x+9x=45-63 16x=-18 x=-1.125 y=-21+3(-1.125) y=-24.375 (-1.125,-24.375)
9x
5x+4x-10 = 35 9x = 35+10 9x = 45 x = 5
If you mean: 9(x-1) = -45 then 9x-9 = -45 and it works out that x = -4