Question

1-Resolver:
a) 2x - 3 = 15
b) 4y = 30 - 18
c) 52 - 6 = Z + 14
d) m + 4 = 20
e) x-8 < -1
f) 5x -8 < 3x + 12
g) 4x - 7 = 2x + 1​

Answer 1

a)

2x - 3 = 15

2x - 3 - 15 = 0

2x = 18 + 0

2x = 18

x = 18/2

x = 9

b)

4y -30 +18 = 0

4y = -12

y = -12/4

y = -3

c)

52 - 6 = Z + 14

-z = -52 +6 +14

-z = -46 +14

-z = -32 .(-1)

z = 32

d)

m + 4 = 20

m = -4 +20

m = 16

e)

x-8 < -1

x< +8 -1

x< 7

f)

5x -8 < 3x + 12

5x - 3x < 8 + 12

2x < 20

x = 20/2

x = 10

g)

4x - 7 = 2x + 1

4x - 2x = 7 + 1

2x = 8

x = 8/2

x= 4