Step-by-step explanation:
(1) x+10y=20, x=20,y=2
(2) 6x+y=-18, x=-3,y=-18
(3) 2x-9y=-36, x=-18,y=4
(4) x=-6,y=-15
(5) x=9,y=12
(6) x=-18,y=-3
(7) x=16,y=-6
(8) x=14,y=8
(9) x=-12,y=9
(10) x=-15,y=-6
(11) x=12,y=10
use calcurature
to sold that problem
Step-by-step explanation:
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Answer:
x = 1.27
y = 5.18
Step-by-step explanation:
to solve this system of equation by simultaneous equation we say that let
3x+y=9.............................. equation 1
-5x+2y=4 .......................... equation 2
from equation 1
3x+y=9.............................. equation 1
y = 9 -3x.............................. equation 3
substitute the value of y = 9 -3x into equation 2
-5x+2y=4 .......................... equation 2
-5x + 2( 9 -3x) = 4
-5x + 18 - 6x = 4
collect the like terms
18 - 4 = 6x + 5x
14 = 11x
divide both side by 11
14/11 = 11x/11
x = 14/11
x = 1.27
put the value of x = 1.27 into equation 3
y = 9 -3x.............................. equation 3
y = 9 - 3( 1.27)
y = 9 - 3.82
y = 5.18
<em>to check if you are correct put the value of x and y into either equation 1 or equation 2.</em>
<em>3x+y=9.............................. equation 1</em>
<em>3( 1.27) + 5.18 = 9</em>
<em>3.81 + 5.18 = 9</em>
<em>9 = 9</em>
Answer:
11
Step-by-step explanation:
r=6+5
=11
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