Question

3×x-12=15 2×x+4=12 5la putereax=25 4la puterea2x=2la puterea 4

Answer 1

3×x-12=15
3×x=15 +12
3×x=27
x=27:3
x=9

2×x+4=12
2×x=12 -4
2×x=8
x=8:2
x=4

5ˣ=25
5ˣ=5²
x=2
 
4²ˣ=2⁴
2⁴ˣ=2⁴
4x=4
x=1