Question

29х+67х=30 720 ; 2n+7n-12=69

Answer 1

1.320=30.720:(29+67)2.9=(69+12):9=9.

Answer 2

Let's solve the equations you've provided:

1. 29x + 67x = 30,720

First, combine the x terms on the left side of the equation:

(29x + 67x) = 96x

So, the equation becomes:

96x = 30,720

Now, to solve for x, you need to isolate x. You can do this by dividing both sides of the equation by 96:

96x / 96 = 30,720 / 96

x = 320

So, the solution to the first equation is x = 320.

2. 2n + 7n - 12 = 69

Combine like terms on the left side of the equation:

(2n + 7n) - 12 = 9n - 12

So, the equation becomes:

9n - 12 = 69

To isolate n, add 12 to both sides of the equation:

9n - 12 + 12 = 69 + 12

9n = 81

Now, divide both sides by 9 to solve for n:

9n / 9 = 81 / 9

n = 9

So, the solution to the second equation is n = 9.