Question

7(4x - 5) - 4(6x + 5)=-91

Explanation:

Step1: Expand the expressions

$7(4x - 5)-4(6x + 5)=-91$ becomes $28x-35-(24x + 20)=-91$, then $28x-35 - 24x-20=-91$.

Step2: Combine like - terms

$(28x-24x)+(-35 - 20)=-91$, so $4x-55=-91$.

Step3: Isolate the variable term

Add 55 to both sides: $4x-55 + 55=-91 + 55$, getting $4x=-36$.

Step4: Solve for x

Divide both sides by 4: $x=\frac{-36}{4}$.

Answer:

$x = - 9$