Question 61102
(82+64+ 98+x)/4=70
(244+x)/4=70 [solve for x]
(4)(244+x)/4=(4)(70)
244+x=280
x=-244+280
x=36
.
Check by plugging (x=36) back into the original equation:
(82+64+ 98+36)/4=70
70=70