0.75x+0.5x=2.25

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0.75x+0.5x=2.250.75x+0.5x=2.250.75x+0.5x=2.250.75x+0.5x=2.251.25x=2.25x=2.25÷1.25x=1.8

0.75x+0.5x=2.25
0.75x+0.5x=2.25

0.75x+0.5x=2.25
0.75x+0.5x=2.25
1.25x=2.25
x=2.25÷1.25
x=1.8