Solve the following addition and subtraction problems. a. 90 cg 95 mg + 7g 12 cg 18 mg b. 4 kg 2hg + 14 kg + 5 kg 17 hg c. 12 dag 5 g – 7 g d. 8 kg – 9 hg

The answers are:

a. 8,133mg

b. 24.9kg

c. 108g

d. 7.1 kg

First, we need to convert all the units for each option, in order to be able to do the addition and substractions, so:

For a.

So,

For b.

So,

For c.

Let's assume the missing signs as negative signs

so,

For d.

Let's assume the missing signs as negative signs

So,

Have a nice day!

93.8

step-by-step explanation:

lets say, first number = x

second number = 3x+7

total = 49

(x)+(3x+7)= 49

4x+7 = 49

4x = 42

x = 42/4

x= 10.5

x= 10.5

3x+7 = 3(10.5)+7 = 93.8

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step-by-step explanation: