Solve for x in the expression 3(x−5)=12 .

x=9

Step-by-step explanation:

3(x-5)=12 is equal to (3×x)-(3*5)=12

so:

3x-15=12

we want to get x by itself. so we are gonna get our variable and our constant on opposite sides.

so we will read 3x-15 as 3x and negative 15. how do we get to 0 from negative 15? we add 15 because the opposite of - is +.

so:

3x - 15= 12

+15. +15

3x. = 27

since we still want x alpne we are going to have divide the whole equation

3x/3=x

27/3=9

therefore x=9

add an image

step-by-step explanation:

answer is 8x+24

area of vanessa's patio = length × width

given, length = (3x² + 5x + 10)

width = (x² - 3x - 1)

area of vanessa's patio = (3x² + 5x + 10)(x² - 3x - 1)

= 3x²(x² - 3x - 1) + 5x(x² - 3x - 1) + 10(x² - 3x - 1)

= 3x⁴ - 9x³ - 3x² + 5x³ - 15x² - 5x + 10x² - 30x - 10

= 3x⁴ - 4x³ - 8x² - 35x - 10

hence, expression of vanessa's patio = (3x⁴ - 4x³ - 8x² - 35x - 10)