Question

Va rog :1.Sa se rezolve ecuatiile: a) 7x-11=66 , b) x:(-4) =-12, c) 150:x=-6 . d) x ori (-13) =65: ex 2 Sa se rezolve in Z : a) 7(x-3)=-42 , b) -3(x+1)=2(x+1)-75, c) 2(x-1)=3(x+4),d) 5(x-2)-7(x+4)=0 rezolvati corect ?

Answer 1

1)
a)
 7x - 11 =66
7x = 11+66
7x = 77
x = 11

b) x:(-4) = -12
x= 12 * 4
x=48

c)150 : x = -6
x = -25

d) x*(-13)=65
x= -65 : 13
x = -5

2)
a) 7(x-3)=-42
x-3 = -42 : (-7)
x-3 = 6
x = 9
Imi pare rau,mai departe nu mai stiu