Question

Решите примеры:
1) ( 13 – 5,6b ) – ( 12 + 10,4b )
2) 37 – ( x – 16 ) + ( 12x – 43 )
При x = ( – 0,01 )
3) 7 + 2 ( 4x – 3 )
4) 1,2 × ( x + 2/3 ) – x + 1,7
При x = 0,7
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ЗАРАНЕЕ СПАСИБО

Answer 1

1) ( 13 – 5.6b ) – ( 12 + 10.4b ) =

= 13 - 5.6b - 12 - 10.4b  =

= 1 - 16b (b - не указано у тебя)

2) 37 – ( x – 16 ) + ( 12x – 43 ) =

= 37 - x + 16 + 12x - 43 =

= 10 + 11x =

= 10 + 11 × (-0.01) =

= 10 + 0.11 =

= 10.11

3) 7 + 2 ( 4x – 3 ) =

= 7 + 8x - 6 =

= 1 + 8 × 0.7 =

= 1 + 5.6 =

= 6.6

4) 1.2 × ( x + 2/3 ) – x + 1.7 =

= 1.2x + 0.8 - x + 1.7 =

= 0.2x + 2.5 =

= 0.2 × 0.7 + 2.5 =

= 0.14 + 2.5 =

= 2.65