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a fost răspuns

2x+5=7
3(2x+5)-4=23
x+1=10/2

Răspuns :

AndreiBest
2x+5=7=>2x=2=>x=1
3(2x+5)-4=23=>6x +15 -4=23=>6x=23-15+4=>6x=12=>x=2
x+1=10/2=>x=10/2 -1=>x=4
2x +5 = 7
2x = 7 - 5 = 2
x = 2 : 2 
x = 1

3(2x + 5) - 4 =23
6x +15 - 4 = 23
6x = 23 - 11 = 12
x = 12 : 6
x = 2

x + 1 = 10/2
x = 5 - 1
x = 4

Multa bafta

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