exam Maths Puzzle Numerical Ability

Solve.

4(7x+10)=3(9x-5)+20

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exam Other Question

how do i know when to use setbuilder notation or lnterval notation m+4>8 Widgets R Us received proceeds of $3,082.67 from a simple discount note at 11% interest for 4 months. What was the maturity value of the note?

a. $3,300
b. $3,200