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18 ) Go...
Collect like terms
Add sides 9
Divide sides by 9
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Add sides 32
Divide sides by 11
19 ) Go...
Add sides 14
Subtract sides 5x
Divide sides by 3
Subtract sides 130
Divide sides by 5
option (b) is correct
step-by-step explanation:
to find the solution of this system, we need to convert it into reduced row-echelon form. we have,
after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,
answer: your correct answer is b. d.