Tu namas dime si así o como
Explicación paso a paso:
4x + 20 = 45 - x
4x + x = 45 - 20
5x = 25
x = 25/5 (o 25÷5)
x = 5
4(5) + 20 = 45 - 5
20 + 20 = 40
40 = 40
3x - 8 = x + 4
3x - x = 4 + 8
2x = 12
x = 12/2 (o 12÷2)
x = 6
3(6) - 8 = 6 + 4
18 - 8 = 10
10 = 10
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Tu namas dime si así o como
Verified answer
Explicación paso a paso:
4x + 20 = 45 - x
4x + x = 45 - 20
5x = 25
x = 25/5 (o 25÷5)
x = 5
4x + 20 = 45 - x
4(5) + 20 = 45 - 5
20 + 20 = 40
40 = 40
3x - 8 = x + 4
3x - x = 4 + 8
2x = 12
x = 12/2 (o 12÷2)
x = 6
3x - 8 = x + 4
3(6) - 8 = 6 + 4
18 - 8 = 10
10 = 10