Question

A)12x+100= -20
B)X+1=14
C)2x-3=5
D)2y+7=-2y-1

Answer 1

a ) 12x=-20-100

12x=-120
x=-120/12

x= -10

b) x=14-1
x=13

c) 2x=5+3
x=8/2

x=4

d) 2y+2y=-1-7

4y=-8

y=-8/4

y= -2

Answer 2

A) 12x + 100 = -20
     12x = -20 - 100
     12x = -120
      x = -120 ÷ 12
      x = -10

B) x + 1 = 14
    x = 14 - 1
    x = 13

C) 2x - 3 = 5
    2x = 5 + 3
    2x = 8
    x = 8 × 2
    x = 4

D) 2y - 7 = -2y -1
     2y + 2y = -1 +7
    4y = 6
    y = 6/4   (simplifica)
    y = 3/2