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Kareem Orr
Mathematics
26 October, 03:03
7x + 2y = 17
(3x + 2y = 3)
+2
Answers (
1
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Patches
26 October, 03:15
0
Step-by-step explanation:
Multiply second equation by - 1
-1 * (3x + 2y) = 3
-3x - 3y = - 3 now add this to the first equation
7x + 2y = 17
(-3x-2y) = - 3
7x + 2y - 3x - 2y = 17 - 3 (2y will eliminate - 2y)
4x = 14
x = 7/2 now by using this information we found we can calculate the value for y
if 3x + 2y = 3 (replace x by 7/2)
3 * (7/2) + 2y = 3 ➡ 21/3 + 2y = 3 ➡ 2y = 3 - 21/3 ➡ 2ty = 15/2 ➡ y = 15/4
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