The pounds amount 12.76 lb converts into 1 gal, one gallon. It is the EQUAL beach sand volume value of 1 gallon but in the pounds weight unit alternative. How to convert 2 gallons (gal) of beach sand into pounds (lb)? Is there a calculation formula? First divide the two units variables.
Answer:
x= -7, y= 12
Step-by-step explanation:
To find the value of x and y, first label the 2 equations.
2x +y= -2 -----(1)
x +y= 5 -----(2)
(1) -(2):
2x +y -(x +y)= -2 -5
2x +y -x -y= -7 <em>(</em><em>expand</em><em> </em><em>bracket</em><em>)</em>
x= -7
subst. x= -7 into (2):
-7 +y= 5
y= 5 +7 <em>(</em><em>+</em><em>7</em><em> </em><em>on</em><em> </em><em>both</em><em> </em><em>sides</em><em>)</em>
y= 12
Answer:
7+4
Step-by-step explanation:
When you are subtracting a negative, you are really adding the number. For example, four minus negative seven is equal to four plus seven.
4 - (-7) = 4+7
4+7 = 7+4 (By the commutive property of addition)
Let me know if this helps!