Can someone explain to me how to do this ?

Step-by-step explanation:

Ex. 4 (2n- 5) = 3n + 10

So since there is a number outside the parenthesis (which is in the first term) You have to distribute the number by multiply 4 to 2n and to -5.

(4*2n) (4*-5) = 6n - 20 (ALWAYS Carry the negative sign when you have a negative answer.)

Then, Do the addition/subtraction property which would be:

6n - 20 = 3n + 10

-3n +20  -3n + 20

3n = 30

/3      /3

n = 10

Hopefully this helps.

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

answerim :

n

step-by-step explanation:

im not sure but my dad knows