we know opposite sides of a rectangle are equal
[tex]\\ \sf\longmapsto 2x+10=18[/tex]
[tex]\\ \sf\longmapsto 2x=18-10[/tex]
[tex]\\ \sf\longmapsto 2x=8[/tex]
[tex]\\ \sf\longmapsto x=\dfrac{8}{2}[/tex]
[tex]\\ \sf\longmapsto x=4[/tex]
Answer:
X = 4
Explanation:
18 = 10+2x
18-10=2x
8/2 = x
