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8344935

= 8344935

(1259 - 3y) : 5 = 55

=> 1259 - 3y = 275

=> 3y = 984

=> y = 328

( 1259 - y x 3 ) : 5 = 55

1259 - y x 3 = 55 x 5

1259 - y x 3 = 275

           y x 3 = 1259 - 275

           y x 3 = 984

                y = 984 : 3

                y = 328

1259 - y x 3 = 55 x 5 = 275

y x 3 = 1259 - 275 = 984

y = 984 : 3 

y = 328

=> 1259 - 3x = 275

=> 3x = 984

=> x = 328

(1259-3x):5=55

1259-3x=275

3x=1259-275

3x=984

x=328

  x+125+159=1259

=>  x=1259-159-125

 =>x=975 

= 975

   **** cho tớ nhé bạn tốt !

X + 125 + 159 = 1259

X + 125 = 1259 - 159 

X + 125 = 1100

         X  = 1100 - 125

         X  = 975

1259 + x = 3457

x = 3457 - 1259

x = 2198   

x=3457-1259

x=2198

3457 -1259 = 2198

\(a.\left(35-815\right)-\left(795-65\right)\\ =35-815-795+65\\ =\left(35+65\right)-\left(815+795\right)\\ =100-1610=-1510\)

Bài 2: 

a: Ta có: \(\left(35-815\right)-\left(795-65\right)\)

\(=35-815-795+65\)

\(=100-1600\)

=-1500

b: Ta có: \(5-197-2015-2015\)

\(=-2010-2212\)

=-4222

c: Ta có: \(1259-1409-12+1259+1409\)

\(=2518-12\)

=2506

12 + 34 + 56 + 78 + 123 + 99 + 322 + 199 = 1223

12 x 45 x 67 x 89 x 0 = 0

12 : 4 : 3 x 9 : 3 x 1259 = 3777

Tk nha

=217 dư 141

tick cho mình nha

a) y = 38 484