Question

1) Phương trình dạng ax+b=0

1) 2x+x+12=0

2) x-5=3-x

3)2x-(3-5x)=4(x+3)

4)2x+3/3=5-4x/2

Answer 1

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1)\(2x+x+12=0\Leftrightarrow3x=-12\Leftrightarrow x=-4\)

2)\(x-5=3-x\Leftrightarrow2x=8\Leftrightarrow x=4\)

3)$2x-\left(3-5x\right)=4\left(x+3\right)\Leftrightarrow 2x-3+5x=4x+12\Leftrightarrow 3x=15\Leftrightarrow x=5$

4)\(\dfrac{2x+3}{3}=\dfrac{5-4x}{2}\Leftrightarrow2\left(2x+3\right)=3\left(5-4x\right)\Leftrightarrow4x+6=15-12x\Leftrightarrow16x=9\Leftrightarrow x=\dfrac{9}{16}\)