Help me So the question is Enter the value for X that makes the equation -2x + 10 + 4x = 70 true

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year. how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

A(t)=728(1+0.04)^t how much money did aditya originally invest