Question

Answer 1

e: =>x+4=78

hay x=74

Answer 2

\(d,\Rightarrow15-x+2=-9\\ \Rightarrow17-x=-9\\ \Rightarrow x=23\\ e,\Rightarrow x+4=78\\ \Rightarrow x=74\\ f,\Rightarrow2x=5\cdot9+49=45+49=94\\ \Rightarrow x=47\)

Answer 3

d.15-(x-2)=(-9)
x-2=24
x=26
e.98-(x+4)=20
x+4=78
x=74
f.\(2x-49=5.3^2\)
\(2x-49=45\)
2x=94
x=47