Question

ex 6
dau coronita
va rog,repede

Answer 1

b) 2x-14 = 126 |:2 ⇒ x - 7 = 63 |+7 ⇒ x = 70

 c) 3,75 -5x = 1,5 |:5 ⇒ 0, 75 - x = 0,3 ⇒ 0,75 - 0, 3 = x ⇒ 0, 45 = x ⇒

⇒ x = 0,45.

Answer 2

$a.2 \frac{2}{3} +x=7 \frac{1}{3} \\ \\ \frac{2*3+2}{3} +x= \frac{7*3+1 }{3} \\ \\ \frac{8}{3} +x= \frac{22}{3} \\ \\ 8+3x=22 \\ 8-22=3x \\ \\ x=- \frac{14}{3} \\ \\ b.2x-14=126 \\ \\ 2x=126+14 \\ \\2x=140 \\ \\ x=70 \\ \\ c.3,75-5x=1,5 \\ \\ 3,75-1,5=5x \\ \\ x=2.25:5 \\ \\ x=0,45$