5x - 3 + 2x = 4x +9 - x 7x-3=3x+9 4x=12 x=3 12 - 7x + 8x - 18 = 3x - 8 x-6=3x-8 -2x=-2 x=1 7 ( 4x + 3 ) - 6 ( 5x + 7 ) = 0 28x+21-30x-42=0 -2x=21 x= -10,5 4z - 3 (8z + 1 ) - 5 (4 - 3z ) = -1 +2 ( 4 - 5z ) 4z-24z-3-20+15z= -1+8-10z -5z-23= -10z+7 5z= 30 z= 6 2 (9x - 1 ) -3 ( 2x +1 ) + 4 = 5 ( 4x + 3 ) 18x-2-6x-3+4= 20x+15 -8x=16 x= -2
5x - 3 + 2x = 4x +9 - x 4x=11 x=2,75 12 - 7x + 8x - 18 = 3x - 8 2x=2 x=1 7 ( 4x + 3 ) - 6 ( 5x + 7 ) = 0 28x+21 - 30x -35=0 2x=14 x=7 4z - 3 (8z + 1 ) - 5 (4 - 3z ) = -1 +2 ( 4 - 5z ) 4z-24z-3-20+15z=-1+8-10z 5z=27 z=5,4 2 (9x - 1 ) -3 ( 2x +1 ) + 4 = 5 ( 4x + 3 ) 18x-2-6x-3+4=20x+15 -8x=16 x=-2 2x/3 - 3x/4 - 1/6 = 1 |*12 8x-9x-2=12 x=-14
5x - 3 + 2x = 4x +9 – x 5x+2x-4x+x=9+3 4x=12 |:4 X=3 12 - 7x + 8x - 18 = 3x – 8 -7x+8x-3x=-8-12+18 -2x=-2 |*(-1) 2x=2 |:2 X=1 7 ( 4x + 3 ) - 6 ( 5x + 7 ) = 0 28x+21-30x-42=0 28x-30x=-21+42 2x=21 |:2 X=1o.5 4z - 3 (8z + 1 ) - 5 (4 - 3z ) = -1 +2 ( 4 - 5z ) 4z-24z-3-20+15=1+8-10z 4z-24z+10z=1+8+3+20-15 -10z=17 |*(-10) Z=-17/10 Z=-1 7/10 2 (9x - 1 ) -3 ( 2x +1 ) + 4 = 5 ( 4x + 3 ) 18x-2-6x-3+4=20x+15 18x-6x-20x=15+2+3-4 -8x=16 |:(-8) X=-2
