Question

[hoàng ngọc ánh]

tìm x \(\varepsilonℤ\)

a) 159 - ( 25 - x ) = 43      

b) ( 79 - x ) - 43 = - ( 17 - 25 )

c) - ( - x + 13 - 142 ) + 18 = 55

d)  ( 102 - 15 ) - ( 15 - x ) = 6

e) \(|x+3|\)= 10

f) - 154 + ( x - 9 - 8 ) = 40 

                         AI GIÚP MK VỚI , NHANH , ĐÚNG TICK NHA 

Answer 1

[Nguyễn Thị Anh Thư]

\(a,159-\left(25-x\right)=43\)

\(\Leftrightarrow25-x=195-43\)

\(\Leftrightarrow25-x=152\)

\(\Leftrightarrow x=25-152\)

\(\Leftrightarrow x=-127\)

\(b,\left(79-x\right)-43=-\left(17-25\right)\)

\(\Leftrightarrow\left(79-x\right)-43=8\)

\(\Leftrightarrow79-x=8+43\)

\(\Leftrightarrow79-x=51\)

\(\Leftrightarrow x=79-51\Rightarrow x=28\)

Answer 2

[Nguyễn Thị Anh Thư]

\(-\left(-x+13-142\right)+18=55\)

\(\Leftrightarrow-\left(-x+13-142\right)=55-18\)

\(\Leftrightarrow-\left(-x+13-142\right)=37\)

\(\Leftrightarrow x+13-142=37\)

\(\Leftrightarrow x=37+142-13\)

\(\Leftrightarrow x=166\)

\(d,\left(102-15\right)-\left(15-x\right)=6\)

\(\Leftrightarrow87-\left(15-x\right)=6\)

\(\Leftrightarrow15-x=87-6\)

\(\Leftrightarrow15-x=81\Rightarrow x=15-81\)

\(\Leftrightarrow x=-66\)