X / 1000 + X / 750 = 1.75 how to solve this equation?

The left side of the equal sign is divided first
750x/750000+1000x/750000=1.75
（750x+1000x）/750000=1.75
1750x/750000=1.75
1750x＝1.75*750000
1750x＝1312500
x＝1312500/1750＝750

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