x+3x=2*(x+300)怎么解大神们帮帮忙

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x+3x=2*(x+300)怎么解大神们帮帮忙x+3x=2*(x+300)怎么解大神们帮帮忙x+3x=2*(x+300)怎么解大神们帮帮忙x+3x=2x+2*3004x=2x+6004x-2x=600

x+3x=2*(x+300)怎么解大神们帮帮忙
x+3x=2*(x+300)怎么解大神们帮帮忙

x+3x=2*(x+300)怎么解大神们帮帮忙
x+3x=2x+2*300 4x=2x+600 4x-2x=600 2x=600 x=600/2=300

4x=2x+600 2x=600 x=300