Step-by-step explanation:
-5x = 10 + 10
-5x = 20
X = 20/-5
X = -4
check :
-5 x -4 =20
20 =20
Answer: i think it is 680 or 340, but my gut says 680...
Step-by-step explanation: 4 x 10 = 40 x 17 = 680
The second attachment I solved in your another question.You may refer to that.
#1
Apply Pythagorean theorem
x²=10²-6²