c) x-4/5=0.8 x=0,8+4/5 x=0,8+0,8 x=1,6 d) 6i 1/8y=1 49/8y=1 /:49/8 y=1*8/49 y=8/49 e) -2,2+x=6,1 x=6,1+2,2 x=8,3 f) -1/3y=10 /:(-1/3) y=10*(-3) y=-30 g) 8a+4=36 8a=36-4 8a=32 /:8 a=4 h) 8/9k+1/3=3 8/9k=3-1/3 8/9k=8/3 /:8/9 k=8/3*9/8 k=3 i)6b-3=-9 6b=-9+3 6b=-6 /:6 b=-1 j) -3/4-1/4l=2.25 -1/4l=2,25+3/4 -0,25l=2,25+0,75 -0,25l=3 /:(-0,25) l=-12 k) -2.5c-8=17 -2,5c=17+8 -2,5c=25 /:(-2,5) c=-10 l) 0.4m-2=-6 0,4m=-6+2 0,4m=-4 /:0,4 m=-10
c) x-4/5 = 0.8 x = 4/5 + 0.8 x = 08 + 0.8 x = 1.6 e) -2.2+ x = 6.1 x = 6.1 - (-2.2) x = 8.3 f) -1/3y = 10 y = 10 : - 1/3 y = 10 *- 3/1 y = -30 g) 8a + 4 = 36 8a = 36 - 4 8a = 32 a = 32 : 8 a = 4 h ) 8/9k + 1/3 =3 8/9k = 3 - 1/3 8/9k = 2 2/3 k = 2 2/3 : 8/9 k = 8/3 * 9/8 k = 3 i)6b - 3 = -9 6b = -9 + 3 6b = -6 b = -6 : 6 b = -1 j) - 3/4 - 1/4l = 2.25 -0.75 - 0.25l = 2.25 0.25l = 2.25 - (-0.75) 0.25l = 3 l = 3 : 0.25 l = 12 k) -2.5c -8 = 17 -2.5c = 17 +8 -2.5c = 25 c = 25 : -2.5 c = - 10 l )0.4m - 2 = -6 0.4m = -6 + 2 0.4m = -4 m = -4 : 0.4 m = -10
Rozwiąż równanie c) x-4/5=0.8 x-0,8=0,8 x=0,8+0,8 x=1,6 d) 6i 1/8y=1 49/8y=1 y=1*8/49 y=8/49 e) -2,2+x=6,1 x=6,1+2,2 x=8,3 f) -1/3y=10 y=10:(-1/3) y=10*(-3) y=-30 g) 8a+4=36 8a=36-4 8a=32 a=4 h) 8/9k+1/3=3 8/9k=3-1/3 8/9k=2 i 2/3 8/9k=8/3 k=8/3*9/8 k=3 i)6b-3=-9 6b=-9+3 6b=-6 b=-1 j) -3/4-1/4l=2.25 -1/4l=2,25+3/4 -1/4l=2,25+0,75 -1/4l=3 l=4:(-1/4) l=4*(-4) l=-16 k) -2.5c-8=17 -2,5c=17+8 -2,5c=25 c=25:(-2,5) c=-10 l) 0.4m-2=-6 0,4m=-6+2 0,4m=-4 m=-4:0,4 m=-10
