Question

I need help on 1 through 4 (will give brainliest)

Answer 1

Step-by-step explanation:

#1

• a + 10 = 20 ⇒ subtract 10 form both sides ⇒ a = 10
• Subtraction property of equality

#2

• 4x - 5 = x + 12 ⇒ add 5 to both sides ⇒ 4x = x + 17
• Addition property of equality

#3

• 5(x + 7) = -3 ⇒ multiply 5 to both terms ⇒ 5x + 35 = - 3
• Distributive property of multiplication

#4

• If AB = BC and BC = CD, then AB = CD
• Transitive property of equality