Question

Repede!!!!Dau coroana!!!​

Answer 1

Răspuns:

Explicație pas cu pas:

a)x+2+2x+1=21, ⇒3x=21-3, ⇒3x=18, ⇒x=6

b) x²+4x+5-(x²+2x+3)=18, ⇒x²+4x+5-x²-2x-3=18, ⇒2x=18-2, ⇒2x=16, ⇒x=8

c) x+1+4x+1=32, ⇒5x=32-2, ⇒5x=30, ⇒x=6