a) 17x + 33x = 100
<=> 50x = 100
<=> x = 2
Vậy x = 2
b) 23x + 15 ( x + 7) = 105
<=> 23x + 15x + 105 = 105
<=> 38x = 0
<=> x = 0
Vậy x = 0
c) 32 (x - 11) + 4x = 152
<=> 32x - 352 + 4x = 152
<=> 36x = 504
<=> x = 14
Vậy x = 14
d) 51 ( 3x + 5) - 406 = 22 (3x +50)
<=> 153x + 255 - 406 = 66x + 1100
<=> 87x = 1251
<=> x = \(\frac{1251}{87}\)
Vậy x = \(\frac{1251}{87}\)
Học tốt nhá :))
Bài làm :
\(a,17x+33x=100\)
\(\left(17+33\right)x=100\)
\(50x=100\)
\(x=2\)
\(b,23x+15\left(x+7\right)=105\)
\(23x+15x+105=105\)
\(38x=0\)
\(x=0\)
\(c,32\left(x-11\right)+4x=152\)
\(32x-352+4x=152\)
\(36x=504\)
\(x=14\)
\(d,51\left(3x+5\right)-406=22\left(3x+50\right)\)
\(153x+255-406=66x+1100\)
\(153x-66x=1100+406-255\)
\(87x=1251\)
\(x=\frac{1251}{87}\)
Học tốt
