I gimnazjum

Matematyka z plusem 1

a) x+7=13      ∣−7      x=6                                                ​​   b) 6+x=−2      ∣−6      x=−8

a) x+1,3=2,7     ∣−1,3      x=1,4                                                ​​   b) 65​+x=31​       ∣−65​

a) 2x+3=15     ∣−3      2x=12     ∣:2       x=6                                                ​​   b) 5x+13=23      ∣−13      5x=10      ∣:5      x=2                                                ​​   c) 3x−11=25     ∣+11      3x=36     ∣:3      x=12                                                ​​

a) 2(x+3)=10      2x+6=10      ∣−6      2x=4     ∣:2      x=2                                                ​​   b) 3(x−1)+2=8      3x−3+2=8      3x−1=8      ∣+1      3x=9     ∣:3      x=3                                                ​​

a) 2(3x−4)=10x      6x−8=10x      ∣−6x       −8=4x      ∣:4      x=−2                                                ​​   b) −4x=3(6−2x)      −4x=18−6x      ∣+6x      2x=18      ∣:2      x=9                                                ​​

a) 3(x+3)=2(x+4)+x+1

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