book Maths Puzzle Numerical Ability

please help me solve this equation 8[(26+10)-4(3+2)]

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book Other Question

Can someone please help me solve this one. Thanks

Write a system of two equations in two unknowns for each problem. Solve each system by substitution.

47.) Different interes factor the quadratic expression completely, and find the roots of the expression.

135x^2 - 222x + 91