Respuesta:
[tex]5 \times + 3 = 43 \\ 5 \times = 43 - 3 \\ \times = 40 \div 5 \\ \times = 8[/tex]
[tex]3 \times + 8 = 17 \\ 3 \times = 17 - 8 \\ \times = 9 \div 3 \\ \times = 2[/tex]
[tex]4 \times - 5 = 23 \\ 4 \times = 23 + 5 \\ \times = 28 \div 4 \\ \times = 7[/tex]
[tex]9 \times + 7 = 25 \\ 9 \times = 25 - 7 \\ \times = 18 \div 9 \\ \times = 2[/tex]
a)
5x+3=43
5x=43-3
5x= 40
x = 40/5
x = 8
comprobación
5(8)+3=43
40+3 =43
b)
4x-5=23
4x=23+5
4x=28
x = 28/4
x = 7
4(7)-5=23
28-5=23
c)
9x+7=25
9x = 25-7
9x = 18
x = 18/9
x = 2
9(2)+7=25
18 +7 = 25
d)
3x+8=17
3x = 17 - 8
3x = 9
x = 9/3
x = 3
3(3)+8=17
9 + 8 = 17
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Verified answer
Respuesta:
[tex]5 \times + 3 = 43 \\ 5 \times = 43 - 3 \\ \times = 40 \div 5 \\ \times = 8[/tex]
[tex]3 \times + 8 = 17 \\ 3 \times = 17 - 8 \\ \times = 9 \div 3 \\ \times = 2[/tex]
[tex]4 \times - 5 = 23 \\ 4 \times = 23 + 5 \\ \times = 28 \div 4 \\ \times = 7[/tex]
[tex]9 \times + 7 = 25 \\ 9 \times = 25 - 7 \\ \times = 18 \div 9 \\ \times = 2[/tex]
Respuesta:
a)
5x+3=43
5x=43-3
5x= 40
x = 40/5
x = 8
comprobación
5(8)+3=43
40+3 =43
b)
4x-5=23
4x=23+5
4x=28
x = 28/4
x = 7
comprobación
4(7)-5=23
28-5=23
c)
9x+7=25
9x = 25-7
9x = 18
x = 18/9
x = 2
comprobación
9(2)+7=25
18 +7 = 25
d)
3x+8=17
3x = 17 - 8
3x = 9
x = 9/3
x = 3
comprobación
3(3)+8=17
9 + 8 = 17