x+167+628-172=4784
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
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\(4784:x+48=100\)
\(=>4784:x=100-48\)
\(=>4784:x=52\)
\(=>x=4784:52\)
\(=>x=92\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(g,101+\left(-60\right)+29+\left(-40\right)=41+29+\left(-40\right)=70+\left(-40\right)=30\)
\(h,167+\left(-252\right)+52+\left(-67\right)=\left(-85\right)+52+\left(-67\right)=\left(-33\right)+\left(-67\right)=-100\)
\(i,38-138+250-350=\left(-100\right)+250-350=150-350=-200\)
\(k,118+107-\left(118-93\right)-50=225-25-50=100-50=50\)
\(m,40+\left(139-172+99\right)-\left(139+199-172\right)=40+\left[\left(-33\right)+99\right]-\left(338-172\right)\)
\(=40+66-166=106-166=-60\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) - 287+ 499+ (- 499)+ 285
= ( - 287 + 285 ) + [ 499 + ( - 499 ) ]
= -2 + 0 = -2
b) ( 326- 43) + ( 174- 57)
= 326 - 43 + 174 - 57
= ( 326 + 174 ) - ( 43 + 57 )
= 500 - 100
= 400
c) ( 351- 875) - ( 125 - 149)
= 351 - 875 - 125 + 149
= ( 351 + 149 ) - ( 875 + 125)
= 500 - 1000
= - 500
x = 4784 + 172 - 628 - 167
x = 4161
x + 167 + 628 -172 = 4784
x + 795 = 4784 +172
x + 795 = 4956
x = 4956 - 795 (TSH)
x = 4161