Question

Vă rogggg! Dau coroana primului răspuns!

Answer 1

(2x-3)*6=54-6x ⇔ 12x-18=54-6x ⇔ 18x=72 ⇔x=4
512:(9x-19)-4=120:2 ⇔ $\frac{512}{9x-19} -4=60$ ⇔ 512=64(9x-19) ⇔
-576x=-1216-512 ⇔ -576x=-1728 ⇔ x=3 x≠19/9(DVA)

Answer 2

a)
(2X - 3)×6 = 54 -6X
12X-18 = 54 - 6X
12X + 6X = 54 + 18
18X = 72
X = 72:18
X = 4

b)
512 : (9X-19) - 4 = 120 : 2
512 : (9X-19) -4 = 60
512 : (9X-19) = 60+4
512 : (9X-19) = 64
9X -19 = 512 : 64
9X - 19 = 8
9X = 8+19
9X = 27
X = 27:9
X = 3