Question

sabe-se que A=(84-5x6)/(7+2x10)x(40-30-2) e B=(8x3/12)+(9/3+6).calcule A+B e A-B

Answer 1

 
 

sabe-se que A=(84-5x6)/(7+2x10)x(40-30-2) e B=(8x3/12)+(9/3+6).calcule A+B e A-B

A=(84-5x6)/(7+2x10)x(40-30-2)
A=(84-30)/(7+20)x(8)
A=(54/27)x(8)
A = 2x8
A = 16

B=(8x3/12)+(9/3+6).
B=(24/12)+(3+6).
B = 2 + 9
B = 11

A+B =  16+11==> 27

A-B =  16-11==> 5