How do I solve 6x+3=18. And 5 (4x-5) = 155

6x+3=18

subtract 3 from both sides

6x=15

divide both sides by 6

x=2.5

5 (4x-5) = 155

distribute the 5

20x-25=155

add 25 to both sides

20x=180

divide both sides by 20

x=9

1) Step 1: Subtract 3 from both sides.

6x + 3 - 3 = 18-3

6x=15

Step 2: Divide both sides by 6.

6x/6 = 15/6

when simplified its 5/2

Answer: 5/2

2) Step 1: Simplify both sides of the equation.

5 (4x-5) = 155

(5) (4x) + (5) (-5) = 155 (Distribute)

20x + - 25 = 155

20x - 25 = 155

Step 2: Add 25 to both sides.

20x-25 + 25 = 155+25

20x = 180

Step 3: Divide both sides by 20.

20x/20 = 180/20

when simplified its x = 9

Answer: x = 9