Question

Помогите 5(3-2a)+3(49-5) при:a 3,5.
(3x)-(2-4x)+(4+3x) при:x 0,1234

Answer 1

1)15-10a+147-15=-10a+147=-10*3,5+147=35+147=182
2)3x-2+4x+4+3x=3*0,1234-2+4*0,1234+4+3*0,1234=3,234

Answer 2

$1) : 5 times (3 - 2 times 3.5) + 3 times (49 - \ - 5 times 3.5) = 5 times( 3 - 7) + 49 - \ - 5 times 3.5 = 5 times ( - 4) + 49 - \ - 5 times 3.5 = - 20 + 49 - 17.5 = \ = 29 - 17.5 = 11.5$
$2) : (3 times 0.1234) - (2 - 4 times \ times 0.1234) + (4 + 3 times 0.1234) = \ = 0.3702 - 1 times 1.5064 + 4 + \ + 3 times 0.1234 = 0.3702 - 1.5064 + 4 \ + 0.3702 = - 1.1362 + 0.3702 = \ = 3.234$