The first thing you need to do is do what is in the brackets. This happens to be 8+7, then you need to multiply this answer by 5. for next time remember bedmas Brackets Exponents ( the small number in the top right hand corner) Division Multiplication Addition Subtraction Though rules change when subtraction or multiplication are in front of division or addition. If so do the working from left to right (This includes multiples of brackets, exponents and such)
