Question

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Halla el valor de x.
a) x + 18 + 35 = 125
b) x - 15 + 7 = 48
c) 23 + x = 75
d) 25x - 72: 2 = 164
e) 5. 11 + x: 7 = 63
f) x: 5 + 30: 6 = 2². 7
g) 5 + 4x = 5³

Answer 1

Respuesta:

$a)x + 18 + 35 = 125 \\ x + 53 = 125 \\ x = 125 - 53 \\ x = 72$

$b)x - 15 + 7 = 48 \\ x - 8 = 48 \\ x = 48 + 8 \\ x = 56$

$c)23 + x = 75 \\ x = 75 - 23 \\ x = 52$

$d)25x - 72 \div 2 = 164 \\ 25x - 36 = 164 \\ 25x = 164 + 36 \\ 25x = 200 \\ x = 8$

$e)5 \times 11 + x \div 7 = 63 \\ 55 + x \div 7 = 63 \\ x \div 7 = 63 - 55 \\ x \div 7 = 8 \\ x = 8 \times 7 \\ x = 56$

$f)x \div 5 + 30 \div 6 = {2}^{2} \times 7 \\ x \div 5 + 5 = 4 \times 7 \\ x \div 5 + 5 = 28 \\ x \div 5 = 28 - 5 \\ x \div 5 = 23 \\ x = 23 \times 5 \\ x = 115$

$g)5 + 4x = {5}^{3} \\ 5 + 4x = 125 \\ 4x = 125 - 5 \\ 4x = 120 \\ x = 30$