Help please! I don’t know the answer to this question

Answer:
x=8
[tex]2x \times 10 \div 2\\ = 2(8) \times 10 \div 2\\ = 16 \times 10 \div 2 \\ = 160 \div 2 \\ = 80[/tex]
Answer:
x = 8 cm
Step-by-step explanation:
Area = 1/2bh
80 = 1/2(10)(2x)
10x = 80
x = 8