Question

please solve these questions​

Answer 1

Answer:

1.6a-4b+7

4a+2b-4

- - +

2a-6b+11

ans:2a-6b+11

2.Cost of 9kg onions =Rs.135

Cost of 14kg onions =14×135/9=14×15=210

ans=210

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

1) 6a - 4b + 7 - ( 4a + 2b - 4 )

= 6a - 4b + 7 - 4a - 2b + 4 ( ∵ - × + = - ;; - × - = + )

= ( 6a - 4a ) + ( - 4b - 2b ) + ( 7 + 4 )

= 2a + ( - 6b ) + 11

= 2a - 6b + 11 ( ∵ + × - = - )

2) Cost of 9 kg of onions = Rs. 135

Cost of 1 kg of onions = Rs. 135 / 9 = Rs. 15

∴ Cost of 14 kg of onions = Rs. 15 ×14 = Rs. 210