Rozwiąż równanie i sprawdź.
1. 8x+7=5x-14
2. 3x+5=2x
3. 6+2x=4x+18
1.8x+7=5x-14
8x-5x=-14-7
3x=-21 |:3
x=-7
SPR.8*(-7)+7=5*(-7)-14
-49=-49
3x-2x=-5
x=-5
SPR. 3*(-5)+5=2*(-5)
-10=-10
2x-4x=18-6
-2x=12 |:(-2)
x=-6
SPR.6+2*(-6)=4*(-6)+18
-6=-6
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1.8x+7=5x-14
8x-5x=-14-7
3x=-21 |:3
x=-7
SPR.8*(-7)+7=5*(-7)-14
-49=-49
2. 3x+5=2x
3x-2x=-5
x=-5
SPR. 3*(-5)+5=2*(-5)
-10=-10
3. 6+2x=4x+18
2x-4x=18-6
-2x=12 |:(-2)
x=-6
SPR.6+2*(-6)=4*(-6)+18
-6=-6