8x+5=7x 8x-7x=-5 x=-5 7n+2=6n-3 7n-6n=-3-2 n=-5 -x+25=2x-2 -x-2x=-2-25 -3x=-27/(-3) x=9 9z-7=-z-6 9z+z=-6+7 10z=-1/10 z=-1/10 25m-3=24m-4 25m-24m=-4+3 1m=-1 m=-1 -s+15=4s-14 -s-4s=-14-15 -5s=-29/(-5) s=5,8 17y+18=19y+27 17y-19y=27-18 -2y=9/(-2) y=4,5 8k-19=8k+19 8k-8k=19+19 0=38
8x+5=7x 8x - 7x = -5 x=-5 8*-5 + 5= 7*-5 -35 = -35 7n+2=6n-3 7n-6n=-3-2 x = -5 -5*7 + 2= -5*6-3 -33 = -33 -x+25=2x-2 -x-2x = -2-25 -3x = -27 / -3 x= 9 -9+25 = 2*9-2 16=16 -9z-7=-z-6 -9z+z=-6+7 -8z= 1 / -8 z = - 1/8 4 7/8 = 4 7/8 25m-3=24m-4 25m-24m= -4+3 m=-1 -28 = -28 -s+15=4s-14 -s-4s= -14-15 -5s= -29 / -5 s= 5 4/5 9 1/5 = 9 1/5 17y+18=19y+27 17y-19y=27-18 -2y= 9 / -2 y= -4,5 -58,5 = -58,5 8k-19=8k+19 8k-8k = 19+19 0= 38
8x+5=7x 8x-7x=-5 x=-5 7n+2=6n-3 7n-6n=-3-2 n=-5 -x+25=2x-2 -x-2x=-2-25 -3x=-27 / : (-3) x=9 -9z-7=-z-6 -9z+z=-6+7 -8z=1/:8 z= -1/8 25m-3=24m-4 25m-24m=-4+3 m=1 -s+15=4s-14 -s-4s=14-15 -5s= -1/: (-5) s=1/5 17y+18=19y+27 17y-19y=27-18 -2y=9/:(-2) y= -4,5 8k-19=8k+19 8k-8k=19+19 0≠38 nie ma rozwiązania
