0.2x+0.4x=12 x=?20x+x=420 x=?

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0.2x+0.4x=12x=?20x+x=420x=?0.2x+0.4x=12x=?20x+x=420x=?0.2x+0.4x=12x=?20x+x=420x=?0.2x+0.4x=120.6x=12

0.2x+0.4x=12 x=?20x+x=420 x=?
0.2x+0.4x=12 x=?20x+x=420 x=?

0.2x+0.4x=12 x=?20x+x=420 x=?
0.2x+0.4x=12
0.6x=12
x=12÷0.6
x=20
20x+x=420
21x=420
x=420÷21
x=20