2 years ago

The sum of two numbers is 30 & their difference is 12.

2 answers:

7 0

X+y=30
x-y=12
add them together

x+y=30
<u>x-y=12+</u>
2x+0y=42

2x=42
divide 2
x=21

subsitute
x+y=30
21+y=30
subtrat 21
y=9

number sare 21 and 9

podryga [215]2 years ago

6 0

The answer is 21 and 9. You can use guess and check to solve this. If you add 21 and 9, the sum is 30, and if you subtract 9 from 21, the difference is 12.

You might be interested in

Pattern x starts with the number 0 and follows the rule "add 2". pattern y starts with the number 30 and follows the rule "subtr

saul85 [17]

Mmmmmmmmmmmmmmmmmmmmmmmmmhjk

5 0

2 years ago

-1/2 + 1 1/2 + 3 - n

GREYUIT [131]

Answer:

The answer all together would be 5 minus n.

Step-by-step explanation:

a negative and a positive equals a positive so -1/2 + 1 1/2 would equal 2 and 2 + 3 equals 5. Then, the remaining numbers are 5 and n. The final answer is 5 minus n because n is unknown.

4 0

2 years ago

PLS HELPPP TIME LIMIT!!!!

Sunny_sXe [5.5K]

Answer:

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

If a 25 ft rope is cut into two sections with one section 4 times as long as the other section, how long is the shorter piece?

DaniilM [7]

X = short section of rope
4x = longer section of rope

x + 4x = 25
5x = 25
x = 5

…or in other words the shorter piece of rope is 5 feet long