What could be the first step toward correctly solving the equation 5x+70=−3x−10

Add '-3x' to each side of the equation.

-70 + 5x + -3x = -10 + 3x + -3x

Combine like terms: 5x + -3x = 2x

-70 + 2x = -10 + 3x + -3x

Combine like terms: 3x + -3x = 0

-70 + 2x = -10 + 0

-70 + 2x = -10

Add '70' to each side of the equation.

-70 + 70 + 2x = -10 + 70

Combine like terms: -70 + 70 = 0

0 + 2x = -10 + 70

2x = -10 + 70

Combine like terms: -10 + 70 = 60

2x = 60

Divide each side by '2'.

x = 30

Simplifying

x = 30

mark brainliest

both are true

Step-by-step explanation:

(4)

Given

7(x + 2x) and 21x

Consider

7(x + 2x) = 7(3x) = 7 × 3x = 21x → True

(5)

Given

2a + 2b + 2c and 2(a + b + c)

Consider

2(a + b + c) ← multiply each term in the parenthesis by 2

= 2a + 2b + 2c → True