0.1x+0.91=-5

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get x by its self so .01x=-5-0.91 to get -5.91 then divide by .01 to get x=-591

.1 x + .91 = - 5isolate x step #1 eliminate .91 from the equation's left side:.1 x + .91 - .91 = - 5 - .91combine like elements:.1 x = -5.91isolate x step #2 by eliminating the .1 coefficient .1 x /.1 = -5.91/.1simply:x = - 5.91/.1perform division operation:x = - 59.10

The answer is -59.1