Answer: C on edge
Step-by-step explanation:
Answer: First option is correct.
Step-by-step explanation:
Since we have given that

We first solve the brackets:
(16-9) = 7
Now, we multiply it with 4

Now, we add 3 to it:

Hence, the value of expression would be 31.
Therefore, First option is correct.
Answer:
x = -2
Step-by-step explanation:
-4x + 3y = 23
y = -7x - 9 // *-3
-4x + 3y = 23
-3y = 21x -27
+++++++++++++++++++
-4x = 21x + 50
-50 = 25x
x = -2