Answer:
x = 9.5
this should be the right answer if the same one you had to solve.
Explanation:
y = 2x - 4
y = 12 + 3 combine them
2x - 4 = 12 + 3
+4 +4 The 4's cancel each other out
2x = 12 + 7 Add then divide
2x = 19
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19 19
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