Question

Subtract the sum of -50 and -75 from the sum of 30 and -150.

Answer 1

Answer:

Step-by-step explanationLet x= the first number and y = the second number:

Eq1,x+y= 30 and x-y=6 Eq2, solve for x in eq2,x=y+6, replace x for y+6 in eq1 and solve for y.

x+y=30;y+6+y=30,2y+6=30,2y=24 hence y=12. Now solve for x in eq2:

x-y=6,x-12=6;x=18 therefore the two numbers are 18 and 12.

Check both equations:

Eq1: x+y=30,18+12=30;30=30.

Eq2: x-y=6,18–12=6;6=6//qed.:

Answer 2

Answer:

-5

Step-by-step explanation:

Sum of 30 & -150

= 30 + (-150)

= 30 - 150

= -120

Sum of -50 & -75

= -50 + (-75)

= -50 - 75

= -125

Therefore,

-180 - (-125)

= -120 + 125

= -5