Complete each of the following statements with the letter that represents the expression,
(312 – 71 + 14) + (5.22 + 41 – 6) is equivalent to expression
(202 – 51 – 3) + (-10x2 + 25 + 7) is equivalent to expression
.
is equivalent to expression

answer:

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Step-by-step explanation:

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -