Register
(3x + 15) +(4x – 9) = 90X =
143k views
3 votes
(3x + 15) +(4x – 9) = 90X =

User Edicarlos Lopes
by
3.4k points

1 Answer

2 votes

We are given the equation,

(3x + 15) + (4x - 9) = 90; Find x

Firstly, we need to open the parentheses

3x + 15 + 4x - 9 = 90

Secondly, we need to collect the like terms

3x + 4x + 15 - 9 = 90

7x + 6 = 90

Make 7x the subject of the formula

7x = 90 - 6

7x = 84

Divide both sides by 7

7x/7 = 84/7

x = 84/7

x = 12

The answer is 12

User Miichi
by
3.4k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

3.4m questions

4.4m answers

Other Questions

A study was completed in Florida. In southern Florida, the study involved 3,000 patients; 54% of them experienced flulike symptoms during the same month. The study had a margin of error of 1.8%. What does
Solve for x in the equation 3 x squared minus 18 x + 5 = 47. (I need this to be an answer like X=3+\_ square root 23)
The sanchez family goes out for dinner, and the price of the meals is $60. The sales tax on the Meals is 7 percent, and they also want to leave a 15 percent tip. What is the total cost of the meal? Analyze
Simplify: 10 ÷ [(5 + 2) − 5]
A survey of 539 adults aged 18-24 year olds was conducted in which they were asked what they did last Friday night. It found: 189 watched TV 163 hung out with friends 29 watched TV and ate pizza, but did
Link Copied!