Question

$9 \times (2x + 1) + 3 = 80$
​

Answer 1

9
(
2

+
1
)
+
3
9
(
2
x
+
1
)
+
3
9(2x+1)+3
1
8

+
9
+
3
18
x
+
9
+
3
18x+9+3
2
1
8

+
9
+
3
18
x
+
9
+
3
18x+9+3
1
8

+
1
2
18
x
+
12
18x+12

1
8

+
1
2