Answer:
Step-by-step explanation:
-(x + y) = (-x) + (-y)
-(3/4 + 2/5) = (-3/4) + (-2/5)
-(15/20 + 8/20) = (-15/20) + (-8/20)
-(23/20) = -15/20 - 8/20
-23/20 = -23/20
verified
1.64 = 164/100 = 41/25 = 1 16/25
1x - 1y = 8
<u>1x + 2y = 2</u>
<u>-3y</u> = <u>6</u>
-3 -3
y = -2
x - (-2) = 8
x + 2 = 8
<u> - 2 - 2</u>
x = 6
(x, y) = (6, -2)
Answer:
the answer i don't really know but imma try or not you actually got it right
Answer:
C
Step-by-step explanation:
7x + 3y = 30 (equation 1)
-2x + 3y = 3 (equation 2)
9x = 27 (subtract the two equations to eliminate y)
x = 3 (divide by 9)
7 * 3 + 3y = 30 (Substitute x = 3 into equation 1, it doesn't matter which equation you substitute into)
21 + 3y = 30 (7 * 3 = 21)
3y = 9 (Subtract 21)
y = 3 (divide by 3)
Answer is (3, 3)
