Question

Rpd va rog,dau coroana si 20 pct​

Answer 1

Răspuns:

(8x+12+8):12-2=3

(8x+20):12=3+2

8x/12+20/12=5 amplificam cu 12 si îl eliminam

8x+20=60

8x=60-20

x=40/8

x=5

Answer 2

$\it [4\cdot(2x+3)+2^3]:12-2=3|_{+2} \Rightarrow [4\cdot(2x+3)+8]:12=5|_{\cdot12} \Rightarrow \\ \\ \Rightarrow 4\cdot(2x+3)+8=60|_{-8} \Rightarrow4(2x+3)=52|_{:4} \Rightarrow2x+3=13|_{-3} \Rightarrow\\ \\ \Rightarrow2x=10|_{:2} \Rightarrow x=5$