Question

Zadanie 6 strona 180 podręcznik matematyka z plusem klasa 6

Z góry dziękuję to pilne;)

Answer 1

A) 1/3(3x - 2) = 2
x - 2/3 = 2
x = 2i2/3

b) 5(x/5 - 3) = 315
5(1/5x - 3) = 315
x - 15 = 315 /+15
x = 330
c) x + 3/ 2 *8 = x - 3
x = -5

d)4(2x - 3/4) = 53
8x - 3 = 53 /-3
8x = 50 /:8
x = 7

e) 2(x + 7) = 3(2x - 5)
2x + 14 = 6x - 15
-4x = -39 /:(-4)
x = 7,25

f) 3(x - 5) + 7 = x +1
3x - 15 + 7 = x + 1
3x - 22 = x + 1
2x = 23 /:2
x = 11,5