Question

me ayuda alguien que sepa??no respondan si no saben graciass

•Resolver mentalmente cada ecuación:

a) x-8=7
b)2x+1=13
c)3x-1=14
d)4x+x=20
e)7x-3x=12
f)x+x=16
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Answer 1

__________________________

x – 8 = 7

x = 7 + 8

x = 15

__________________________

2x + 1 = 13

2x = 13 – 1

2x = 12

x = 12/2

x = 6

__________________________

3x – 1 = 14

3x = 14 + 1

3x = 15

x = 15/3

x = 5

__________________________

4x + x = 20

5x = 20

x = 20/5

x = 4

__________________________

7x – 3x = 12

4x = 12

x = 12/4

x = 3

__________________________

x + x = 16

2x = 16

x = 16/2

x = 8