X - y = -3
Move constant to the left by adding its opposite to both sides
x - y + 3 = -3 + 3
The sum of two opposites equals
your answer would be: x - y + 3 = 0
-4x+y=16
-5x-y=21
Subtract -5x-y=21 from -4x+y = 16
which leave x=-5
Then substitute -5 for x to get y. In the first equation .
Step-by-step explanation:
1. 3x+5+4x-1
7x+4
2. 5x-3-2x+1
3x-2
3. -7x+4-5x-12
-12x-8
4. 4x-10-5x-2
-x-12
plz mark brainliest
Answer:
B n D
Step-by-step explanation:
Area of a trapezoid, A = 1/2 × (a + b) h, where a = 19 cm, b = 23 cm & h = 14 cm.
By substitution, we have
A = 1/2 × (19 + 23)14
= 1/2 × 14(19 + 23)
= 1/2 × 14(42)
= 7(42)
= 294 sq. cm