Solve 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

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

Solve for x

$x=-2$

Steps for Solving Linear Equation

Use the distributive property to multiply $3x$ by $2x-1$.

$$6x^{2}-3x-6x\left(7+x\right)=90$$

Use the distributive property to multiply $-6x$ by $7+x$.

$$6x^{2}-3x-42x-6x^{2}=90$$

Combine $-3x$ and $-42x$ to get $-45x$.

$$6x^{2}-45x-6x^{2}=90$$

Combine $6x^{2}$ and $-6x^{2}$ to get $0$.

$$-45x=90$$

Divide both sides by $-45$.

$$x=\frac{90}{-45}$$

Divide $90$ by $-45$ to get $-2$.

$$x=-2$$