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Solve the equation 3x + 2x = 0.9
3x+2x=0.9
5x=0.9
x=0.9/5
x=0.18
Solving equation 3x ^ 3-2x ^ 2-9 = 0
The equation has three heels, which can be reduced to 3 (x-a) (X-B) (x-C) = 0
And then it's simplified and solved according to the coefficient relationship
I can't see the first solution at a glance, otherwise it will be simple
3x-2(9-2x)=24 x=6
3x-2(9-2x)=24
3x-18+4x=24
7x=24+18
x=42/7=6
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