\[2.3x+2.8=-1.2x+9.8\]
1
Subtract 2.82.8 from both sides.
2.3x=−1.2x+9.8−2.82.3x=-1.2x+9.8-2.8

2
Simplify  −1.2x+9.8−2.8-1.2x+9.8-2.8  to  −1.2x+7-1.2x+7.
2.3x=−1.2x+72.3x=-1.2x+7

3
Add 1.2x1.2x to both sides.
2.3x+1.2x=72.3x+1.2x=7

4
Simplify  2.3x+1.2x2.3x+1.2x  to  3.5x3.5x.
3.5x=73.5x=7

5
Divide both sides by 3.53.5.
x=73.5x=\frac{7}{3.5}

6
Simplify  73.5\frac{7}{3.5}  to  22.
x=2x=2

Done

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