If 2x+9=j(x),find x if j(x)=12
1 answer:
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40 = -5 × 
First, simplify 5 × to 
/ Your problem should look like: 40 = 
Second, multiply both sides by 8. / Your problem should look like: 320 = -5n
Third, divide both sides by -5. / Your problem should look like:
= n
Fourth, simplify to 
/ Your problem should look like: 
= n
Fifth, simplify
to 64. / Your problem should look like: -64 = n
Sixth, switch sides. / Your problem should look like: n = -64
Answer: n = -64
First, simplify 5 ×
Second, multiply both sides by 8. / Your problem should look like: 320 = -5n
Third, divide both sides by -5. / Your problem should look like:
Fourth, simplify
Fifth, simplify
Sixth, switch sides. / Your problem should look like: n = -64
Answer: n = -64