1: =>7x-4x=8+7
=>3x=15
hay x=5
2: \(\Leftrightarrow3-2x=3x+3-x-2\)
=>3-2x=2x+1
=>-4x=-2
hay x=1/2
3: \(\Leftrightarrow15x+10-4x-1=0\)
=>11x+9=0
hay x=-9/11
4: \(\Leftrightarrow6x-2=x-2\)
hay x=0
5: \(\Leftrightarrow2x+2x=32-7\)
=>4x=25
hay x=25/4
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