Question

HELPPPPPPPP I NEED THE ANSWER PLZZZZZZZZZZZ!!!!!!!!!!! the solutions plz

1. 8c–(11+6c)=–2

2. (3z+4)–(2z+9)=15

3. 12–(4x–18)=(36+4x)+(18–6x)

4. 36a–(9a+5)=(6a–17)

Answer 1

1. c = -4.5
2. z = 20
3. x = -12
4. a = -4/7

Explanation:

A way to do this that will always work is ...

• eliminate parenthses and collect terms
• subtract any constants from the left side
• subtract any variable terms from the right side
• divide by the coefficient of the variable

1.

• 8c -11 -6c = -2
• 2c -11 = -2
• 2c = 9
• c = 4.5

2.

• 3z +4 -2z -9 = 15
• z -5 = 15
• z = 20

3.

• 12 -4x +18 = 36 +4x +18 -6x
• 30 -4x = 54 -2x
• -4x = 24 -2x
• -2x = 24
• x = -12

4.

• 36a -9a -5 = 6a -17
• 27a -5 = 6a -17
• 27a = 6a -12
• 21a = -12
• a = -12/21 = -4/7