3 years ago

A number a decreased by 7 is 2.

Mathematics

2 answers:

umka21 [38]3 years ago

7 0

Answer:

Step-by-step explanation:

Let's first convert this to numbers. When a number is decreased by a certain amount, that is the same as saying that something is subtracted from it. Therefore:

a-7=2

Add 7 to both sides:

a-7+7=2+7

a=9

Hope this helps!

Minchanka [31]3 years ago

5 0

Answer:

Step-by-step explanation:

If a number (Let's call it x) has been subtracted by 7 (x - 7) then to find the previous number you just do the opposite. Let's call the end result y. 2 + 7 = x (Or y + 7 = x). <u>2 + 7 = 9.</u>

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Thanks for the help pt.1

erma4kov [3.2K]

(jk)(x)= j (k(x)) = j(9-2x)

= -7(9-2x) = -63 + 14x

but i see there is no such option. may be second option is typo.

so you can select 2nd option

4 0

3 years ago

Read 2 more answers

2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2=

Tomtit [17]

Answer:

Step-by-step explanation:

i counted 24 2's and 24 x 2 is 48 also i did the math