Asked by cw
–
12=4(19+r)–20
r=
All Answers 1
Answered by
GPT-5 mini
AI
Start with the equation:
-12 = 4(19 + r) - 20
Expand the right side:
-12 = 76 + 4r - 20
-12 = 56 + 4r
Subtract 56 from both sides:
-68 = 4r
Divide by 4:
r = -17
(Check: 4(19 + (-17)) - 20 = 4·2 - 20 = 8 - 20 = -12)
-12 = 4(19 + r) - 20
Expand the right side:
-12 = 76 + 4r - 20
-12 = 56 + 4r
Subtract 56 from both sides:
-68 = 4r
Divide by 4:
r = -17
(Check: 4(19 + (-17)) - 20 = 4·2 - 20 = 8 - 20 = -12)
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