Answer:
Step-by-step explanation:
angle 1 + angle 3 = 27 +43 = 70
angle 2 = 180-70 = 110
angle 2 + angle 4 = 180
180 -angle 2 = angle 4 = 180-110 = 70
angle 4 = 70 degrees
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<span>x-y=1 (1)
x+y=3 (2)
Add (1) and (2) to eliminate y:
x- y + x - y =1 + 3
2x = 4
x = 4/2
</span><span>x = 2
Substitute x = 2 into (1) to find y:
2 + y = 3
y = 3 - 2
y = 1
The solution is (2, 1) </span>