Question

Rezolva in Q
a) 3(x-1)=x+7
b)$\frac{5}{2}(0,4x-1)= (\frac{3}{4}) ^{4}*( \frac{4}{3}) ^{3}$

Answer 1

3x-3=x+7
3x-x=7+3
2x=10
x=10/2
x=5

2x/2-5/2=(3/4)⁴⁻³
x=3/4+5/2
x=(3+10)/4
x=13/4
x=3,25