2x + 3x + 20 + 10x - 5 = 10x + 16 What does x equal?

Hel and a good explanation, not just the answer pls.

Lindsay is creating a bridge out of dried pasta and glue. in her plans, she sketches the graph to determine the lengths of the noodles, in centimeters, needed for the arch to increase the length of the bridge in 1 centimeter increments.which function did lindsay use to create her design? f(x) = (x – 5)2 + 8 f(x) = –(x + 5)2 + 8 f(x) = 0.5(x + 5)2 + 8 f(x) = –0.5(x – 5)2 + 8

Name the most appropriate metric unit for each measurement

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is