Respuesta :

first distribute

0.04x+8=900

subtract 8

0.04x=900-8 or 892

isolate x divide both sides by 0.04

x=892/0.04

x=22,300 amount earned last year

check plug in x

0.04(22,300+200)=900

0.04(22,500)=900

900=900

wiseowl2018

Answer:

Last year earning were  $22,300

Step-by-step explanation:

The equation is given which is that Mrs. Hernandez saves 4% and earned $200 more and she saved $900.

Equation

0.04 (x +200) = 900

Solving the equation

0.04x + 8 = 900

0.04x = 900 -8

0.04x = 892

X = 892/ 0.04

X = 22,300

Hence, her last year earning were  $22,300

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