5(x-3)=70-45

5(x-3)=25

x-3=25:5

x-3=5

x=5+3=8

10+2x=16

2x=16-10

2x=6

x=6:2=3

7.(x-14)+35=56

7.(x-14)=56-35

7.(x-14)=21

x-14=21:7

x-14=3

x=3+14

x=17

324-(318-x)=115

318-x=324-115

318-x=209

x=318-209

x=109

m/=-5/12+(6/11+11/11)

=-5/12+17/11

=-55/132+204/132

=149/132

=(-2/8+5/8)+3/8

=3/8+3/8

=3/4

inconvenient

môn j z cụ

chết nhìn sai đề

yep bất ngờ chx

cháu nhìu acc lắm-)

2/5:x=1/26:125/1000

2/5:x=1/26:1/8

2/5:x=4/13

x=2/5:4/13

x=13/10