Question 1202809
16 + 4 x (7 + 8) - 3 = ?
pemdas.
expressions in parentheses first inner parentheses to outer parentheses.
expression becomes 16 + 4 * 15 - 3
exponents would be next but you don't have any.
multiplication is next going from left to right.
expression becomes 16 + 60 - 3
addition is next going from left to right.
expression becomes 73.
if you have a scientific calculator and you enter the expression exactly as shown, it should give you baack 73 when you hit the return.


here's a reference.
<a href = "https://www.mathsisfun.com/operation-order-pemdas.html" target = "_blank">https://www.mathsisfun.com/operation-order-pemdas.html</a>


here's anaother.
<a href = "https://www.cuemath.com/numbers/pemdas/" target = "_blank">https://www.cuemath.com/numbers/pemdas/</a>


here's another.
<a href = "https://www.purplemath.com/modules/orderops.htm" target = "_blank">https://www.purplemath.com/modules/orderops.htm</a>


lots more.
just do a search on "pemdas" and they will appear.