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2(x+2)=10
2x+4=10
2x=10-4
2x=6/:2
x=3
b)
-3(2x-1)=-15
-6x+3=-15
-6x=-15-3
-6x=-18/:(-6)
x=3
c)
1/5(10x+5)=7
2x+1=7
2x=7-1
2x=6/:2
x=3
d)
0,4(3x-2)=4
1,2x-0,8=4
1,2x=4+0,8
1,2x=4,8/:1,2
x=4
2x+4=10
2x=10-4
2x=6
x=3
-3(2x-1)=-15
-6x+3=-15
-6x=-15-3
-6x=-18
x=3
2(x+2)=10
2x+4=10
2x=10-4
2x=6/:2
x=3
b)
-3(2x-1)=-15
-6x+3=-15
-6x=-15-3
-6x=-18/:(-6)
x=3
c)
1/5(10x+5)=7
2x+1=7
2x=7-1
2x=6/:2
x=3
d)
0,4(3x-2)=4
1,2x-0,8=4
1,2x=4+0,8
1,2x=4,8/:1,2
x=4