rozwiąż równania
zad 1
2x+7=13
7x+4=3x+20
9x+10=4x+25
zad 2
2x-5=17
4x-9+x=12
5x-12=3x+4
6x-18=2x+2
zad 3
11x+10=2x+37
12x+6=9x+12
10x+16=3x+2
13x+30=21x+14
zad 4
5x-12=4+4x
9x-8=3x+2
10x-4=5x+8
2x-2=-12x+18
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ZAD 1
2x+7=13
2x=13-7
2x=6/:2
x=3
7x+4=3x+20
7x-3x=20-4
4x=16/:4
x=4
9x+10=4x+25
9x-4x=25-10
5x=15/:5
x=3
ZAD 2
2x-5=17
2x=17+5
2x=22/:2
x=11
4x-9+x=12
3x=12+9
3x=21/:3
x=7
5x-12=3x+4
5x-3x=4+12
2x=16/:2
x=8
6x-18=2x+2
6x-2x=2+18
4x=20/:4
x=5
ZAD 3
11x+10=2x+37
11x-2x=37-10
9x=27/:9
x=3
12x+6=9x+12
12x-9x=12-6
3x=6/:3
x=2
10x+16=3x+2
10x-3x=2-16
7x=-14 /:7
x=-7
13x+30=21x+14
13x-21x=14+30
-8x=-16/:(-8)
x=2
ZAD 4
5x-12=4+4x
5x-4x=4+12
x=16
9x-8=3x+2
9x-3x=2+8
6x=10/:6
x=1i2/3
10x-4=5x+8
10x-5x=8+4
5x=12/:5
x=2i2/5
2x-2=-12x+18
2x+12x=18+2
14x=20/:14
x=1i3/7