Question

resolva as equações:
a) 8x-24=5x+18
b)25-3x=x-67
c)18+5x=67-4x
d)3x+48=142-x
e)4y+17=28+2y
f)5a+14=68+2a
g)8c+48=232
h)62-5b=145
i)3b-15=68
j2a-68=5a+245

Answer 1

Resposta:

Explicação passo a passo:

a) 8x-24=5x+18 => 8x - 5x = 18 + 24 => 3x = 42 => $x =\frac{42}{3} = > x = 14$

b)25-3x=x-67=> -3x -x = -67 -25 => -4x = -92 .(-1)=> 4x = 92 => $x=\frac{92}{4} = > x = 23$

c)18+5x=67-4x => 5x +4x = 67-18=> 9x = 49 => $x =\frac{49}{9}$ => x ≅ 5,44

d)3x+48=142-x => 3x + x = 142-48 => 4x = 94 => $x=\frac{94}{4} = > x =23,5$

e)4y+17=28+2y=> 4y - 2y = 28 -17 => 2y =11 => $y=\frac{11}{2}= > y = 5,5$

f)5a+14=68+2a=> 5a - 2a=68 - 14=> 3a = 54 => $a=\frac{54}{3= > a = 18}$

g)8c+48=232=> 8c = 232-48 => 8c =184 => $c =\frac{184}{8}= > c = =23$

h)62-5b=145=> -5b = 145 -62 => -5b = 83.(-1) => 5b = -83=> $b = \frac{-83}{5} = > b = -10,375$

i)3b-15=68=> 3b =68 + 15 => 3b = 83 => $b=\frac{83}{3}$

j2a-68=5a+245 => 2a -5a = 245 +68 => -3a = 313.(-1) => 3a = -313 => $a = \frac{-313}{3}$