`#\text {DNamNgV}`
`10,`
`a)`
`x + 43 - 43 = 37`
`=> x + (43 - 43) = 37`
`=> x = 37`
Vậy, `x = 37`
`b)`
`(-135 + x) + 247 - (-235) = 0`
`=> -135 + x + 247 + 235 = 0`
`=> (235 - 135) + x + 247 = 0`
`=> x + 100 + 247 = 0`
`=> x + 347 = 0`
`=> x = -347`
Vậy, `x = -347`
`c)`
`-72 - (x - 38) = 172`
`=> x - 38 = -72 - 172`
`=> x - 38 = -244`
`=> x = -244 + 38`
`=> x = -206`
Vậy, `x = -206`
`d)`
`-214 - [(117 - x) - 314] = 0`
`=> (117 - x) - 314 = -214`
`=> 117 - x = -214 + 314`
`=> 117 - x = 100`
`=> x = 117 - 100`
`=> x = 17`
Vậy, `x = 17.`
\(a,x+43-43=37\)
\(\Rightarrow x+\left(43-43\right)=37\)
\(\Rightarrow x=37\)
\(b,\left(-135+x\right)+247-\left(-235\right)=0\)
\(\Rightarrow x+\left(-135+235\right)+247=0\)
\(\Rightarrow x+100+247=0\)
\(\Rightarrow x+347=0\)
\(\Rightarrow x=-347\)
\(c,-72-\left(x-38\right)=172\)
\(\Rightarrow-72-x+38=172\)
\(\Rightarrow-34-x=172\)
\(\Rightarrow x=-34-172\)
\(\Rightarrow x=-206\)
\(d,-214-\left[\left(117-x\right)-314\right]=0\)
\(\Rightarrow-214-117+x+314=0\)
\(\Rightarrow x-17=0\)
\(\Rightarrow x=17\)
#Toru
