Resolver 3x(2x - 1) - 6x(7 + x) = 90 | Equatix - Math Solver

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Example

3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$3x(2x-1)-6x(7+x)=90$$