Grace solved the equation 122 = x - 58. Her work is shown.

x = -180

Step-by-step explanation:

From the question, 122 = x - 58

Step 1: To find x, we have to make x the subject of the formula

x = -58 - 122

x = -180

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step-by-step explanation:

sorry no step by step

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)