Question

–4a + 9 = –2(4 + 5a) – 7


please find a

Answer 1

a=-4

Explanation:

• Expand -2(4+5a)-7:
  -10a-8-7
  -10a-15
• Subtract 9 from both sides:
  -4a+9-9=-10a-15-9
  -4a=-10a-24
• Add 10a to both sides:
  -4a+10a=-10a-24+10a
  6a=-24
• Divide both sides by 6:
  6a÷6=-24÷6
  a=-4

Answer 2

-4a + 9 = -8-10a -7
-4a+10a=-8-7-9
6a = -24
a = -24 /6
a = -4