Mathematics, 18.03.2021 06:40, googoo4

4. Find the mistake and correct, 10x+7y=-
- 7x-2y-1
STEP 41 2 (lóx+ 7y=-1)
77-4x-2y=-1)
STEP #2 20x+144 = - 22
-498-my
- 29x = -23
-29
-29
X
23 름 or x = 0.99
10 (0.79) + 7y=-11
7.9+7y=-
STEP 3:
-7.9
+y=-11.9
+
y=-1.7
(0.79,-17)
STEP 4:
a) At what step did the make mistake occur?
b) Describe the mistake.

Answers: 1

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4. Find the mistake and correct, 10x+7y=-
- 7x-2y-1
STEP 41 2 (lóx+ 7y=-1)
77-4x-...