Explicație pas cu pas:
1. 2x = 4*4 => 2x = 16 => x = 8
2. 3x + 6 = 27 => 3x = 21 => x = 7
3. 2x + 3 = 3x + 2 /-2x => 3 = x + 2 => x = 1
4. 5 ( x+2) = 4 (x+3) => 5x + 10 = 4x + 12 /-4x => x + 10 = 12 => x = 2
Răspuns:
2x=(3+1)²
2x=4²
2x=16
x=16÷2
x=8 (3)
3(x+2)=27
3x+6=27
3x=27-6
3x=21
x=21÷3
x=7 (4)
2x+3=3x+2
2x-3x=2-3
-x= -1
x=1 (5)
x+2=x+3
5x+10=4x+12
5x-4x=12-10
x=2 (1)
