[tex]\sf\huge\underline\color{pink}{༄Answer:}[/tex]
[tex]\tt6.8x + ( - 8.9) + (6.8x) + 8.9 \\ = \tt6.8x - 8.9 + 6.8x + 8.9 \\ = \tt6.8x + 6.8x + 0 \\ = \tt6.8x + 6.8x \\ = \large\boxed{\tt{\color{pink}{13.6x}}}[/tex]
[tex]\color{pink}{==========================}[/tex]
ꕥMakaira Hatanakaꕥ
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