rozwiąż równamie i sprawdzi
2x+3=15
-2x-7=11
2x+3=15 spr. 2*6+3=15 12+3=15
2x=12 / 2
x=6
-2x-7=11 spr -2*-9=18
-2x=11+7 18-7=11
-2x=18 \ -2
x=-9
2x=15-3
2x=12/:2
2x6+3=12+3=15
-2x=11+7
-2x=18/:(-2)
-2x(-9)-7=18-7=11
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2x+3=15 spr. 2*6+3=15 12+3=15
2x=12 / 2
x=6
-2x-7=11 spr -2*-9=18
-2x=11+7 18-7=11
-2x=18 \ -2
x=-9
2x+3=15
2x=15-3
2x=12/:2
x=6
2x6+3=12+3=15
-2x-7=11
-2x=11+7
-2x=18/:(-2)
x=-9
-2x(-9)-7=18-7=11