a) 1/3(3x-2)=2
x-2/3=2
x=2+2/3
x=2 2/3
b) 5(x/5-3)=315
5x/5-15=315
x=315+15
x=330
c) (x+3)/2 *8=x-3
(8x+24)/2=x-3 |* (obie strony równania mnożę przez 2)
8x+24=2x-6
8x-2x=-6+24
6x=18/:6
x=3
d) 4(2x-3/4)=53
8x-12/4=53
8x-3=53
8x=53+3
8x=56/:8
x=7
e) 2(x+7)=3(2x-5)
2x+14=6x-15
2x-6x=-15-14
-4x=-29/:(-4)
x=7 1/4= 7,25
f) 3(x-5)+7=x+1
3x-15+7=x+1
3x-x=1+15-7
2x=9/:2
x=4 1/2= 4,5
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a) 1/3(3x-2)=2
x-2/3=2
x=2+2/3
x=2 2/3
b) 5(x/5-3)=315
5x/5-15=315
x=315+15
x=330
c) (x+3)/2 *8=x-3
(8x+24)/2=x-3 |* (obie strony równania mnożę przez 2)
8x+24=2x-6
8x-2x=-6+24
6x=18/:6
x=3
d) 4(2x-3/4)=53
8x-12/4=53
8x-3=53
8x=53+3
8x=56/:8
x=7
e) 2(x+7)=3(2x-5)
2x+14=6x-15
2x-6x=-15-14
-4x=-29/:(-4)
x=7 1/4= 7,25
f) 3(x-5)+7=x+1
3x-15+7=x+1
3x-x=1+15-7
2x=9/:2
x=4 1/2= 4,5